Conceal
Hiding, Ambush
noun, する verb
Bow your head to conceal yourself better than you were concealing yourself before. If you want to go into hiding you need to know how to lay low!
せんぷく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
我々はマフィアの潜伏捜査をすることになった。
We conducted an undercover investigation of the mafia.