The phrase "effortless by" is grammatically correct and can be used in written English.
It is typically used to describe something that is done without much effort or difficulty. Example: Her dance moves were effortless by her natural talent and years of practice.
The spinning is effortless by now.
With little material set and being aware of the virtual walls, the action took tremendous skill, but appeared effortless by the cast.
While my guests have come to expect the impossible from Waldorf Astoria Hotels & Resorts, a concierge's primary mission is to simply make guests' travel effortless by pre-planning everything so they can skip the wait and get straight to the experience.
These additions were made effortless by introducing each new sequence near its closest partner (the first hit in a routine BlastP check).
It has an extraordinary freshness and openness, and an effortless scene-by-scene swing in the story that hardly seems like a story at all.
Anchored by lectures from Clark (played with effortless verve by the film's director, Mark Hendrickson) on how easy, helpful and normal it is to be manipulative, the documentary we see and the one within it are not as they appear.
You also heard virtuoso fripperies like "Africa" (1891), an exotic fantasy dispatched with effortless grace by the pianist Gilles Vonsattel, and the cheery caprice-valse "Wedding Cake," presented by Mr. Weiss and the Bard Festival Players.
"Prodigy's Effortless Swagger," by Hua Hsu.
At Loewe, giant leather rucksacks hand painted with wild mushrooms, designed with effortless intelligence by Jonathan Anderson, dominated the fashion industry's consciousness.
But nothing to inspire neutrals, no grace or lyricism or sequences of rhymed passes such as those produced with such effortless ease by their Spanish opponents.
You understandably hear a lot about their mastery of the dancefloor groove, but they wrote melodies that sounded luscious and effortless backed by complex jazzy chords, the legacy of Rodgers' childhood listening to his parents' Miles Davis and John Coltrane albums.
