引而不发 - ChineseDict

yin3

引

er2

而

bu4

不

fa1

发

發

chengyu

to pull the bow without shooting (idiom from Mencius); ready and waiting for action
to go through the motions
to practice
a trial run

引 (引): to draw (e.g. a bow); to pull; to stretch sth; to extend; to lengthen; to involve or implicate in; to attract; to lead; to guide; to leave; to provide evidence or justification for; old unit of distance equal to 10 丈[zhang4], one-thirtieth of a km or 33.33 meters
而 (而): and; as well as; and so; but (not); yet (not); (indicates causal relation); (indicates change of state); (indicates contrast)
不 (不): no; not so; (bound form) not; un-
发 (發): to send out; to show (one's feeling); to issue; to develop; to make a bundle of money; classifier for gunshots (rounds)

Examples