俊士 is read as しゅんし (shunshi) and means genius.
しゅんし
shunshi
しゅんえい
excellence
しゅんそく
person of great talent
しゅんばつ
uncommon
しゅんしゅう
genius
どし
fellow
さむらい
man in attendance (on a person of high standing)
りきじ
Deva king
だいぎし
parliamentarian
べんごし
lawyer
へいし
soldier
はかせ
instructor at the imperial court (ritsuryō period)
ぶし
samurai