noun: Any fish of the genus Betta, especially Betta splendens (the Siamese fighting fish).
adjective: Pronunciation spelling of better (comparative of good). [Greater in amount or quantity]
adverb: Pronunciation spelling of better (comparative of well). [Greater or lesser (whichever is seen as more advantageous), in reference to value, distance, time, etc.]
adverb: (slang) Pronunciation spelling of better (had better). [Greater or lesser (whichever is seen as more advantageous), in reference to value, distance, time, etc.]