From moros; to become insipid; figuratively, to make (passively, act) as a simpleton -- become fool, make foolish, lose savour.
see GREEK moros
1. in classical Greek to be foolish, to act foolishly.
2. in Biblical Greek a. to make foolish: passive Romans 1:22 (Isaiah 19:11; Jeremiah 10:14; 2 Samuel 24:10); equivalent to to prove a person or thing to be foolish: τήν σοφίαν τοῦ κόσμου, 1 Corinthians 1:20 (τήν βουλήν αὐτῶν, Isaiah 44:25).
b. to make flat and tasteless: passive of salt that has lost its strength and flavor, Matthew 5:13; Luke 14:34.