From the base of pou and te; indefinite adverb, at some time, ever -- afore-(any, some-)time(-s), at length (the last), (+ n-)ever, in the old time, in time past, once, when.
see GREEK pou
see GREEK te
1. once, i. e. at some time or other, formerly, aforetime;
a. of the Past: John 9:13; Romans 7:9; Romans 11:30; Galatians 1:13, 23 (cf. Winer's Grammar, § 15, 7); Ephesians 2:2f, 11, 13; Ephesians 5:8; Colossians 1:21; Colossians 3:7; 1 Thessalonians 2:5; Titus 3:3; Philemon 1:11; 1 Peter 2:10; 1 Peter 3:5, 20; ἤδη πότε, now at length, Philippians 4:10.
b. of the future: Luke 22:32; ἤδη πότε, now at length, Romans 1:10.
2. ever: after a negative, οὐδείς πότε, Ephesians 5:29 (Buttmann, 202 (175).); οὐ ... πότε, 2 Peter 1:21; μή πότε (see μήποτε); after οὐ μή with the aorist subjunctive 2 Peter 1:10; in a question, τίς πότε, 1 Corinthians 9:7; Hebrews 1:5, 13; ὁποῖοί πότε, whatsoever, Galatians 2:6 (but some would render πότε here formerly, once; cf. Lightfoot ad loc.).