Choose the perfect synonym or antonym for the word Showing deep thought, consideration, or an earnest demeanor.
Serious
/ˈsɪəriəs/Synonyms:
Antonyms:
Examples:
Are you serious?
'Are you serious, Mr Scrooge?'
His face suddenly became very serious.
Etymology:
The word serious originates from the Latin serius, meaning weighty, important. It passed into Middle English in the late 14th century.
Usage Statistics:
123 mentions per 1 million words 
Hint: Frequency according to COCA
Very Often
Hint: Frequency according to COCA
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