士

also 侍

1. noun, historical warrior (esp. of military retainers of daimyos in the Edo period); samurai
2. colloquial person with a strong backbone; person that does incredible things; person of considerable talent

し

1. suffix practitioner; specialist; professional; person (esp. one licensed in a certain profession); -er; -or; -ian; -ist
2. noun man (esp. one who is well-respected)
3. historical samurai