尻しりを据すえる

expression, ichidan verb

sit down firmly; settle down; plant oneself

Implies sitting down with determination, often for a long stay or to take a firm stance. More emphatic than 座る.

• 彼かれは応おう接せつ室しつのソファに尻しりを据すえて、なかなか帰かえろうとしなかった。

  He planted himself on the sofa in the reception room and showed no sign of leaving.

• 交こう渉しょうのテーブルに尻しりを据すえる覚かく悟ごはできている。

  I'm ready to sit down firmly at the negotiating table.