Strong's #4669: miphtach (pronounced mif-tawkh')
from 6605; an aperture, i.e. (figuratively) utterance:--opening.
Brown-Driver-Briggs Hebrew Lexicon:
ּ
miphtâch
1) opening, utterance
Part of Speech: noun masculine
Relation: from H6605
Usage:
This word is used 1 times:
Proverbs 8:6: "for I will speak of excellent things; and the opening of my lips shall be right things."