Most cat communication centers around meowing demands regarding food, play, attention or to answer cats calling them.
Meow
Purrs demonstrate contentment but also used to self-soothe anxiety and pain so context clues inform proper interpretation.
Purring
Defensive/fearful noises often warning unwanted approachers away or showing discomfort with situation.
Hissing
Odd chirp-like sounds express positive emotions like excitement or greeting owners. Often flock communication.
Chirping
Mimics wild cat teeth clacking to warn rivals from territory or sizing up prey vermin for hunting.
Teeth Chattering
Aggressive vocalization mimicking a growl paired with folded back ears. Signals rising anger/irritation.
Snarling
Painful persistent yowling indicates distress from injury, neglect, loss or marking mating readiness. Seek cause.
Caterwauling