swear

verb

1. 1

   have confidence or faith in

   We can trust in God

   Rely on your friends

2. 2

   utter obscenities or profanities

   The drunken men were cursing loudly in the street

3. 3

   promise solemnly; take an oath

4. 4

   to declare or affirm solemnly and formally as true

   Before God I swear I am innocent

5. 5

   make a deposition; declare under oath