Striking means so noticeable and impressive that it stops you for a second look. A striking resemblance, striking colours, strikingly beautiful.
It is about the force of the impression rather than about beauty — a striking contrast, a striking absence, a striking difference — though of a person it is usually a compliment meaning arresting rather than pretty. A striking resemblance is the fixed phrase. Note strikingly, used as an intensifier; and that striking is also the participle of strike, so context does the work.
1adjectivestrikingSo noticeable and impressive that it stops you for a second look.
“There's a striking resemblance between the two sisters.”
synonyms: arresting, remarkable
striking is a quality of impact.
Also accepted in games: remarkable