To take a liquid into the mouth and swallow; to drink. Also used for taking medicine.
のどが渇いたから、水を飲む。
I'm thirsty, so I'll drink some water.
朝、薬を飲むのを忘れないでください。
Don't forget to take your medicine in the morning.
彼は一気にビールを飲んだ。
He downed a beer in one go.
子供はスープをゆっくり飲んでいた。
The child was sipping the soup slowly.
To smoke tobacco — an older or idiomatic usage (not the usual modern verb 吸う).
彼は若い頃、よく煙草を飲んでいたらしい。
Apparently he used to smoke a lot when he was young.
歌の歌詞で〈煙を飲む〉という表現が出てくる。
The song lyrics use the expression 'to drink smoke'.
To swallow up or engulf (often used in the passive): something large swallows something smaller, or one is overwhelmed/absorbed by a larger force.
津波が港町を飲み込んだ。
The tsunami swallowed the port town.
小さな会社は大手に飲まれてしまった。
The small company was absorbed by the big firm.
To suppress or hold back emotions (anger, tears, etc.); to restrain a reaction.
彼女は悔しさを飲んで、笑顔を作った。
She swallowed her frustration and forced a smile.
怒りを飲んで深呼吸した。
He held back his anger and took a deep breath.
子どもは涙を飲んで我慢した。
The child swallowed their tears and endured it.
To accept demands, conditions, or proposals; to agree to (someone's terms).
会社は労働組合の要求を一部飲んだ。
The company accepted part of the union's demands.
条件が厳しかったが、彼はそれを飲んだ。
The conditions were harsh, but he agreed to them.
To make light of someone or, conversely, to be overwhelmed/intimidated by someone; to overawe or be overawed by someone.
彼の迫力に新人選手はすっかり飲まれてしまった。
The rookie was completely intimidated by his intensity.
場の雰囲気に飲まれないように落ち着いて話してきなさい。
Stay calm and don't be overwhelmed by the atmosphere when you speak.
To conceal or carry a weapon (e.g., a dagger) on one's person; to hide something (archaic/idiomatic).
彼は短刀を袖に飲んでいたと疑われた。
He was suspected of concealing a dagger in his sleeve.