達者
たっしゃ · tassha · JLPT N1 · na-adj
in good health
💪 達 = attain, reach mastery + 者 = person: someone who has attained skill, or is hale and hearty
達 (tatsu) means to reach or attain, and 者 means person. Someone who has reached full skill, or who is robust and in good health, is 達者. The set phrase お達者で (otassha de) means take care.
者 — old/elder 耂 + say 曰
Originally depicted sugarcane or a similar plant, but the form was reanalyzed as 耂 (old) over 曰 (say). It became a grammatical suffix meaning 'one who…' or 'the…thing,' nominalizing verbs and adjectives. Today 者 mainly marks agents or categories, as in 学者 'scholar' or 记者 'reporter.'