swear at

To make a solemn declaration, invoking a deity or a sacred person or thing, in confirmation of and witness to the honesty or truth of such a declaration.

To make a solemn promise; vow.

To use profane oaths; curse.

Law To give evidence or testimony under oath.

To declare or affirm solemnly by invoking a deity or a sacred person or thing.

To promise or pledge with a solemn oath; vow: He swore his oath of allegiance to the queen. See Synonyms at promise.

To utter or bind oneself to (an oath).

Law To administer a legal oath to: All the witnesses have been sworn.

To say or affirm earnestly and with great conviction.

To have great reliance on or confidence in: He swears by his personal physician.

To have reliable knowledge of; be sure of: I think she left early, but I couldn't swear by it.

To take an oath by: He swore by all the angels and saints of heaven.