An antonym is a word that means the opposite of another word. An antonym for "accidental" would be "intentional."
success
It means Success!
The Spanish word éxito means success.
Accidental is an adjective.
The word "complexity" does not describe patterns in a poem.
The root word of accidental is "accide," which comes from the Latin word "accidere," meaning "to happen."
The word successful is an adjective. It means to have accomplished whatever was previously proposed.
it means it is the right thing
When he threw his baseball in his window, it was accidental.
good luck, break a leg.......
profit, progress, prosperity