noun, noun or participle which takes 'suru'
waiting for the tide; waiting for a good opportunity
Literally waiting for the rising tide, often used metaphorically for biding one's time until conditions are favorable. Can be used as a noun or with する.
漁師たちは潮待ちをしながら網の準備をした。
The fishermen prepared their nets while waiting for the tide.
彼は潮待ち
He is biding his time, waiting for a good investment opportunity.