有志之士

yǒuzhìzhīshì
(idiom) person with the passion and resolve to pursue noble ideals

CEDICT

person of noble aspirations; person with lofty ideas

Wiktionary

有志氣、有抱負的人。

重編國語辭典

Entry Composition

1 有志 yǒuzhì to be ambitious
2 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it
3 士 shì
  1. member of the senior ministerial class (old)
  2. scholar (old)
  3. bachelor
  4. honorific
  5. soldier
  6. noncommissioned officer
  7. specialist worker