打頭陣

To hit, strike, beat, or fight; to attack; to make a phone call or perform an action with an object; to inject; to remove; to emit; to make involuntary movements.

The top part of the body; hair; a leader or boss; the beginning or end of something; a suffix for nouns, verbs, adjectives, or location words.

A formation or disposition of troops; a burst or spell of activity; a classifier for events or short periods of time; a battlefield.