cheerful adj.
VERBS appear, be, feel, look, seem, sound | become | keep, remain, stay I'm amazed that she keeps so cheerful. | keep sb We tried to keep him cheerful.
ADV. amazingly, extremely, incredibly, remarkably, very | almost | fairly, quite | falsely ‘The doctor is on her way, ’ said Mrs Morris, sounding falsely cheerful.
You can also check other dicts: cheerful (English, 中文解释 ), wordnet sense, Collins Definition