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pin down

pin down

 
See:
pin
part of speech: phrase
definition 1: to force to come to a decision, action, or the like.
I pinned him down on the deadline.
synonyms:
compel, press, pressure
similar words:
constrain, force, high-pressure, make
definition 2: to make clear, precise, or definite.
She pinned down the exact time of the earthquake.
synonyms:
determine, name, pinpoint, specify
similar words:
designate, nail down