at home in something—very competent in a particular subject (with the implication that it makes a person feel confident and relaxed):
Category: Confusing Phrases
At home vs On home ground
at home—(predic.) very competent in smth. (with the implication that it makes a person feel confident and relaxed):
At high pressure vs Under high pressure
at high pressure—1. (of matter) when strongly pressed:
At hazard vs On the hazard
on the hazard— = at hazard 2:
At hand vs In hand
at hand—(also: on hand) within easy reach; close by:
At full time vs In the fullness of time
Note: The expression does not correlate in meaning with the phrase full time—
At full strength vs In full strength
Note: Neither expression correlates in meaning with the phrase with all one’s strength—using as much physical effort as one can:
At full length vs At great length
at full length—
At first vs First of all
at first—in the beginning; originally:
At dusk vs In the dusk
at dusk—at the time when the twilight is setting in:
At danger vs In danger
at danger—(of a signal on a railway line, etc.): in the position giving a warning of danger:
At command vs In command vs On command
at command—said of smth. at one’s disposal (and ready to be used)