笔挺

bi3 ting3

(standing) very straight; straight as a ramrod; bolt upright; well-ironed; trim

笔锋

bi3 feng1

the tip of a writing brush; vigor of style in writing; stroke; touch

笔记

bi3 ji4

to take down (in writing); notes; a type of literature consisting mainly of short sketches; CL:本[ben3]

笔录

bi3 lu4

to put down in writing; to take down notes; transcript; record

笔

bi3

pen; pencil; writing brush; to write or compose; the strokes of Chinese characters; classifier for sums of money, deals; CL:支[zhi1],枝[zhi1]