兒科醫師 (ji4 fo1 ji1 si1) — paediatrician, pediatrician in Cantonese

final particle / suffix, placed after many commonly used nouns to avoid employing one-syllable terms in speech (very common in the Beijing dialect 北京話, see: 兒化, 兒化韻)

class; variety; family (of plants or animals)

cure; treat; heal

division in the Chinese army;