Answer:

swear

Answer	Crossword Clue
SWEAR	Use four-letter words
SWEAR	Take an oath
SWEAR	Affirm

SWEAR	Speak indelicately
SWEAR	Talk a blue streak?
SWEAR	Use cusswords
SWEAR	Take a vow
SWEAR	Cuss
SWEAR	Utter oaths
SWEAR	Speak an oath
SWEAR	Speak French, you might say

SWEAR	Risk an FCC fine, perhaps
SWEAR	Vow
SWEAR	Testify
SWEAR	Give one's word
SWEAR	Promise
SWEAR	Curse
SWEAR	Incense the censor
SWEAR	Speak bluish?

SWEAR	Be blasphemous
SWEAR	Declare solemnly
SWEAR	Cuss a blue streak
SWEAR	Use profane language
SWEAR	Attest
SWEAR	Give a damn?
SWEAR	Vow to honor an oath
SWEAR	Solemnly promise

SWEAR	Utter a promise ... or a profanity
SWEAR	Exchange vows
SWEAR	Cross one's heart
SWEAR	Keep the censor busy
SWEAR	Make a vow
SWEAR	Make an oath
SWEAR	State under oath
SWEAR	State an oath, one way or another

SWEAR	Vow under oath
SWEAR	Give testimony
SWEAR	Give an oath
SWEAR	Show that you're leveling
SWEAR	Use profanity