bitter: Someone who is bitter is angry and unhappy because they cannot forget bad things that happened in the past
Adjective: Someone who is bitter is angry and unhappy because they cannot forget bad things that happened in the past
bright: full of light, shining
Adjective: The lights are too bright in here - they're hurting my eyes.
exited: of or in an energy state higher than the normal or ground state
Adjective: the excited atom returns to its former energy state and emits light or other radiation