• raise (a difficult subject) for discussion

Synonyms: bring up, raise, introduce, talk about, mention, touch on, open, embark on, enter on, air, ventilate

• pierce (a cask) to draw out liquid

Synonyms: pierce, puncture, tap

• (of a fish or sea mammal) rise through the water and break the surface

• (of a ship) veer and pitch forward, presenting a side to the wind and waves and losing steerage control

• a sudden and unwelcome veering of a ship that causes it to broach