The phrase "ambiguous arm" is grammatically correct and can be used in written English.
It can be used in contexts where you want to describe an arm that is unclear or has multiple interpretations, possibly in a metaphorical sense.
Example: "The artist's painting featured an ambiguous arm that seemed to reach out for something just beyond the canvas."
Alternatives: "uncertain limb" or "vague arm".
It periodically returns to Sri Lanka, as if in a dream or memory; the image of an elephant will stir, enigmatically, from the darkness of sleep or forgetting, like an ambiguous call to arms.
Eileen Thomas and Andre Boynton moved fluently through the increasingly complex flow of arm gestures and ambiguous embraces that progressively described a turbulent relationship: an emotional tour de force as usual.
Russia was quick to position itself last week as a potential peace broker but it has also played an ambiguous game over the years, intensely arming both sides of the conflict.
With heavily armed men keeping watch, ambiguous wording on the ballot slip and a bungled Ukrainian attempt to stop voting in one town that ended with one dead, it was clear that this was no ordinary referendum.
Luce was so friendless and ambiguous that Mr. Brinkley is often at arm's length from his subject.
Communication errors, where prescriptions were rated as ambiguous or unclear, were significantly higher in the control arm compared with the intervention arm.
As many as a dozen countries — including Syria, North Korea and Iran — have hinted that they may do so; more significantly, Russia, a top arms supplier, has also sent ambiguous signals.
Terence Crutcher was not holding a phone, or any ambiguous object, and this was clear because his arms were in the air.
Arm-in-arm on pointe, willowy and knowing, they echo the sexually ambiguous "girls in grey" in Bronislava Nijinska's Les Biches (1924).
The one after "state" would be used today; the one after "arms" would not; the one after "militia" is ambiguous; and all three have caused a world of hurt, confusion and argumentation over the last 223 years.
