serious · dangerous · deep · difficult · far-reaching · grievous · important · major · meaningful · severe · significant · tough · urgent. Weak matches. arduous ...

Synonyms and examples. earnest. At that time he was an earnest young environmental activist. sober. The mood of the gathering was sober and reflective. sombre.

Synonyms: serious, important, dangerous, critical, crucial (informal), alarming, severe, grave, sudden, urgent, decisive.

more serious · dangerous · deep · difficult · far-reaching · grievous · important · major · meaningful · severe · significant · tough · urgent. Weak matches.

serious · adjective. of great consequence · adjective. requiring effort or concentration; complex and not easy to answer or solve · adjective. completely ...

most serious · dangerous · deep · difficult · far-reaching · grievous · important · major · meaningful · severe · significant · tough · urgent. Weak matches.

Adjective. of great consequence. Synonyms. serious. Related. important · of import. Adjective. appealing to the mind. Synonyms. good · serious. Related.

Of an important nature, grave in manner or disposition, thoughtful in manner or disposition, requiring considerable thought or reflection.

Synonyms: staid, sedate, sober. being in earnest; sincere; not trifling: His interest was serious.