そふ
grandfather (my own)
sofu
JMdict 1396840
祖父(そふ)はgrandfather強(つよ)いstrong
My grandfather is strong
は (topic) lifts 祖父(そふ) (grandfather) up as the topic — “as for grandpa…” — and the rest comments on him. 強い(つよい) (strong) is an i-adjective standing on its own at the end; no copula is needed because the adjective already does the work of “is.”
