It belongs to a phonetic family with 仕, 志, and 誌 — they share the 士 component and the reading シ.
A common word using 士 is 博士 (はかせ), meaning “doctorate, PhD., doctor”.
Don't confuse it with 土, 志, 吉, and 工 — 土 (earth): bottom stroke longer · 士 (samurai): top stroke longer