What does 严峻 (yánjùn) mean in English?

Card 2999HSK Level 42999/3571
CARD2999
PROGRESS84%
严峻
嚴峻
yánjùn
stern; serious; harsh(Adjective)

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d