Swear

verb (used without object), swore or (Archaic) sware; sworn; swearing.
1.
to make a solemn declaration or affirmation by some sacred being or object, as a deity or the Bible.
2.
to bind oneself by oath.
3.
to give evidence or make a statement on oath.
4.
to use profane oaths or language:
Don’t swear in front of the children.
verb (used with object), swore or (Archaic) sware; sworn; swearing.
5.
to declare, affirm, attest, etc., by swearing by a deity, some sacred object, etc.
6.
to affirm, assert, or say with solemn earnestness.
7.
to promise or undertake on oath or in a solemn manner; vow.
8.
to testify or state on oath:
He swore it on the witness stand.
9.
to take (an oath), as in order to give solemnity or force to a declaration, promise, etc.
10.
to bind by an oath:
to swear someone to secrecy.
Verb phrases
11.
swear by,

to name (a sacred being or thing) as one’s witness or guarantee in swearing.
Informal. to have great confidence in; rely on:
He swears by his dentist.
to have certain knowledge of:
I thought I saw him leaving, but I couldn’t swear by it.

12.
swear in, to admit to office or service by administering an oath:
A new president will be sworn in today.
13.
swear off, to promise or resolve to give up something, especially intoxicating beverages.
14.
swear out, to secure (a warrant for arrest) by making an accusation under oath.
verb swears, swearing, swore, sworn
1.
to declare or affirm (a statement) as true, esp by invoking a deity, etc, as witness
2.
(foll by by)

to invoke (a deity, etc) by name as a witness or guarantee to an oath
to trust implicitly; have complete confidence (in)

3.
(intransitive) often foll by at. to curse, blaspheme, or use swearwords
4.
(when transitive, may take a clause as object or an infinitive) to promise solemnly on oath; vow
5.
(transitive) to assert or affirm with great emphasis or earnestness
6.
(intransitive) to give evidence or make any statement or solemn declaration on oath
7.
to take an oath in order to add force or solemnity to (a statement or declaration)
8.
(informal) swear blind, to assert emphatically
noun
9.
a period of swearing