be serious

/biː ˈsɪriəs/
phraseIntermediate
informal

to be sincere, earnest, or committed to something

She was serious about her studies and never missed a class.

She took her studies very seriously and attended every class.

He’s not serious about the relationship; he’s just playing around.

He doesn’t take the relationship seriously; he’s just having fun without commitment.

💡

Often used to describe someone who is focused, determined, or not joking.

Collocations

be serious aboutto be committed to or focused on somethingtake something seriouslyto treat something with importance

Synonyms

Antonyms

Related Phrases

take something seriouslyphrase
to treat something with importance
get seriousphrase
to become more focused or committed

💡Pro Tip

Context Matters

The phrase 'be serious' can be used both positively (to praise commitment) and negatively (to criticize lack of sincerity). Pay attention to tone.

Gold Rule

Avoid Overuse

While 'be serious' is useful, overusing it can make your speech sound repetitive. Vary your vocabulary with synonyms like 'earnest' or 'committed.'

📖Word Origin

From Middle English 'serious,' meaning 'grave' or 'solemn,' derived from Latin 'serius,' meaning 'earnest.'

📝Usage Notes

This phrase is commonly used in both formal and informal contexts to emphasize sincerity or commitment. It can also be used to question someone's intent, as in 'Are you serious?'

Word Breakdown

be
to exist in a certain state
verb
+
serious
sincere, earnest, or important
adjective
English Dictionary