Answer:

seething

Answer	Crossword Clue
SEETHING	Aboil
SEETHING	All worked up
SEETHING	Intensely hot.

SEETHING	Boiling.
SEETHING	In a state of violent agitation.
SEETHING	Angry.
SEETHING	In an agitated state.
SEETHING	Angry
SEETHING	Mad
SEETHING	Plenty mad
SEETHING	More than miffed

SEETHING	Boiling
SEETHING	More than annoyed
SEETHING	Really angry
SEETHING	Ready to explode