swear verb
1 use bad language
ADV. loudly | quietly, silently, softly, under your breath | viciously, violently
VERB + SWEAR hear sb He heard her swear under her breath.
PREP. at He swore loudly at her and left.
2 make a serious promise
ADV. solemnly He swore solemnly that he would never hit her again. | on oath
VERB + SWEAR be prepared to I would be prepared to swear on oath that they didn't see me. | make sb He made her swear on the Bible that she wouldn't leave him.
PREP. by I swear by Almighty God to tell the truth. | to I swear to you, I don't know anything.
PHRASES swear sb to secrecy/silence We were all sworn to secrecy about the plan.
You can also check other dicts: swear (English, 中文解释 ), wordnet sense, Collins Definition