流れに逆らって

against the current

→ 流れ
phrase Rare #42,175
against the current Used literally for moving against a flow or current, and figuratively for going against a trend or prevailing direction.
JA: 周りの意見の流れに逆らって、自分の考えを貫いた。
EN: He went against the prevailing opinion and stuck to his own ideas.

彼らは流れに逆らって泳いだ

They swam against the current.

流れに逆らって泳いでみよう

Let's try swimming against the current.

彼は流れに逆らって泳ごうとした

He tried to swim against the tide.