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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
protrude on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "protrude on" is not correct in standard English usage.
The correct expression would typically be "protrude into" or "protrude from," depending on the context. Example: "The branches of the tree protrude into the pathway, making it difficult to walk through."
⚠ May contain grammatical issues
Science
News & Media
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
4 human-written examples
In the video, his back is covered in the red and welted tranches of baton swipes, and two lumped bruises protrude on his forearm.
News & Media
It can also happen that a dart will pierce the body or head entirely, and protrude on the other side.
Wiki
Amino acid residues R99, R139 and F147 protrude on the surface, whereas the other residues are partially or fully buried inside the structure of Nse3 (Fig. 3C).
Science
18 The operating surgeon could not be blind in the trial and, as the Kirschner wires protrude on the back of the wrist and the locking plate require an incision, nor could the patient.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
54 human-written examples
A 1 cm slice of the agar block (as prepared above) was then placed on top of the area of the extended root to be imaged, leaving the root tip protruding on one side and the leaves on the other side.
Science
Alex draped him around his shoulders, Kent's head hanging down on one side and useless legs — one so unnaturally protruding — on the other.
News & Media
Then my eyes fastened on two protruding screws, one on each side of the interior of Hana's letter box: in their functional ugliness they were reassuring.
News & Media
Novelty yarns, used to produce special effects, include bouclé, characterized by projecting loops; nub yarn, with enlarged places, or nubs, produced by twisting one end of a yarn around another many times at one point; and chenille, a soft, lofty yarn with pile protruding on all sides.
Encyclopedias
Now a minuscule rim of fingernail protruded on a few of his fingers, and this brought him a certain sense of pride.
News & Media
It also unveiled the Street View Trekker, a bulky backpack with several 15-megapixel cameras protruding on a stalk, so that operatives can capture "offroad" imagery from hiking trails, narrow alleyways or the forest floor.
News & Media
"We have worked with the players individually and collectively and we have had extra patrols and security near their residences without them even knowing it because we don't want to be protruding on their privacy," Solan said.
News & Media
Expert writing Tips
Best practice
When describing something extending outward, use "protrude from" or "protrude into" for clarity and grammatical correctness. For example, instead of "The nail protruded on the wall", say "The nail protruded from the wall".
Common error
Avoid using "protrude on" as it is not standard English. Always use "protrude from" to indicate the origin of the projection, or "protrude into" to indicate the space or area the object extends towards. Remember that "protrude" already implies a surface, so "on" is redundant and grammatically incorrect.
Source & Trust
80%
Authority and reliability
2.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "protrude on" functions as a verb phrase, attempting to describe the action of something extending outward from a surface. However, Ludwig AI analysis indicates that it is not grammatically correct in standard English.
Frequent in
Science
40%
News & Media
40%
Wiki
20%
Less common in
Encyclopedias
0%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "protrude on" is grammatically incorrect and should be avoided in favor of "protrude from" or "protrude into". As Ludwig AI highlights, while some examples exist, they don't represent standard English usage. The phrase attempts to describe something extending outward and making contact with a surface but can lead to confusion. Sticking to the correct alternatives ensures clarity and grammatical accuracy, especially in formal writing or professional communication. The contexts where this phrase appears are varied from science, news media or wiki, but still incorrect.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
protrude from
Uses "from" to indicate the origin of the protrusion, emphasizing where the object extends out of.
protrude into
Uses "into" to indicate the space or area that the object extends towards or occupies.
stick out
A more informal way of saying something extends outward; simpler vocabulary.
extend outward
Uses "extend" which is a synonym for protrude and "outward" indicates the direction.
project outward
Replaces protrude with "project" to describe the action of extending outward.
jut out
Uses the verb "jut", implying a more angular or forceful projection.
bulge out
Describes a rounded or swollen projection.
poke out
Informal and suggests a sharp or pointed projection.
stand out
Implies prominence or visibility rather than physical extension.
reach out
Suggests an intentional or purposeful extension.
FAQs
Is "protrude on" grammatically correct?
No, "protrude on" is not considered grammatically correct in standard English. The correct forms are "protrude from" or "protrude into", depending on the intended meaning.
What does "protrude from" mean?
"Protrude from" means to extend outward from a surface or object. For example, "The branches protrude from the tree trunk."
When should I use "protrude into" instead of "protrude from"?
Use "protrude into" when you want to emphasize the space or area that the object is extending towards. For example, "The roots protrude into the neighboring garden."
What are some alternatives to "protrude from"?
Alternatives to "protrude from" include "stick out", "extend outward", or "jut out". The best choice depends on the specific context.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
80%
Authority and reliability
2.5/5
Expert rating
Real-world application tested