抽插

抽插	chōu chā	to slide in and out / thrusting
抽	chōu	to draw out / to pull out from in between / to remove part of the whole / (of certain plants) to sprout or bud / to whip or thrash
插	chā	to insert / stick in / pierce / to take part in / to interfere / to interpose
插	chā	old variant of 插