knuckle under
انگریزی
[ترمیم]فعل
[ترمیم]knuckle under (third-person singular simple present knuckle unders، present participle knuckle undering، simple past and past participle knuckle undered)
knuckle under (third-person singular simple present knuckle unders، present participle knuckle undering، simple past and past participle knuckle undered)