serious

/sˈi‍əɹɪəs/

/ˈsɪɹiəs/

serious

bad or dangerous; significant or worrying due to a possible danger or risk

synonyms : dangerous

thinking carefully about things, and not joking

antonyms : frivolous

of great consequence

appealing to the mind

synonyms : good

completely lacking in playfulness

synonyms : sober

antonyms : playful

requiring effort or concentration; complex and not easy to answer or solve

Examples

1. Her condition is very serious.

2. She remains serious, even in chaotic situations.

3. We had a serious talk about our future.

4. Plastic waste is a serious problem for our environment.