μυέωmyéō

to initiate, i.e. (by implication) to teach

Greek (New Testament) · G3453

Meanings

to initiate into the mysteries (so chiefly in classical Greek; LXX, 3 Maccabees 2:30); hence, to instruct: passive, Philippians 4:12 (RV, I have learned the secret).

Same root

μυστήριονmystḗrion · G3466a secret or "mystery" (through the idea of silence imposed by initiation into religious rites)
μῦθοςmŷthos · G3454a tale, i.e. fiction ("myth")

Where it appears

Appears 1 times in the Bible.

Philippians 4:12 I know how to live on almost nothing or with everything. I have learned the secret of living in every situation, whether it is with a full stomach or empty, with plenty or little.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.