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auxiliary verb indicating the causative voice
auxiliary verb indicating the permissive voice
auxiliary verb strengthening the honorific notion
ネクタイをきつくしめて苦しくなった。
I tightened my tie too tight and it became uncomfortable.
王は家臣に城門を固く守らしめた。
The king made his retainers guard the castle gate firmly.
厳しい訓練が兵士たちを強くしめている。
Rigorous training is making the soldiers stronger.