(DIG) [verb] [T] [past simple] sank or sunk, [past participle] sunk - to dig (a hole) in the ground, or to put (something) into a hole dug into the groundSinking more wells is the best way of supplying the population with clean drinking water.The first stage of building the fence is sinking the posts into the ground.See also sunken.
SINK
Meaning of SINK in English
Cambridge English vocab. Кембриджский английский словарь. 2012