From Middle Chinese.
老師 (hiragana ろうし, romaji rōshi, historical hiragana らうし)
- an elderly monk; a sage; an elderly teacher or master
- (from the way that 師 (shi) can also mean “a military group”) the exhaustion of military troops from fighting a protracted war
老師 (traditional, Pinyin lǎoshī, simplified 老师)
- Wǒ de lǎoshī gěi wǒ hěn dà yālì.
- My teacher puts me under a lot of pressure.
Derived terms 
Min Nan 
老師 (traditional, POJ lāu-su, simplified 老师)