諭 is built from the 言 and 俞 (hollow out (in 輸·愉)) components.
It belongs to a phonetic family with 輸, 癒, and 愉 — they share the 俞 component and the reading ユ.
A common word using 諭 is 養護教諭 (ようごきょうゆ), meaning “school nurse; nurse teacher”.
Don't confuse it with 輸, 愉, and 癒.