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asymptote
a line that approaches a curve but never touches it
asymptotic
Approaching a limit but never reaching it.
asynchronous
Not occurring at the same time or rate.
at a canter
moving at a smooth and easy pace
at a distance
from far away
at a draught
quickly in a single gulp
at a glance
quickly or briefly, without deep inspection.
at a loss
Confused or unsure about what to do.
at a loss for words
Unable to speak or express oneself.
at a low ebb
in a weak or low state
at a moment's notice
without any warning.
at a pinch
in an emergency or difficult situation
at a stand
In a stationary or unmoving position.
at all
In any way or degree.
at all events
In any case; regardless of circumstances.
at all hands
on all sides or everywhere
at all hours
any time of the day or night
at any given moment
At any specific point in time.
at arm's length
at a safe distance from someone
at bay
in a defensive position; unable to escape.
at bottom
Fundamentally; at the core of something.
at cross-purposes
Working toward conflicting goals.
at daggers drawn
in a fierce disagreement or conflict
at death's door
Very close to dying or extremely ill.