Brown-Driver-Briggs
[
אָנַק]
verb cry, groan (Aramaic
אֲנַק 
—
Qal Imperfect יֶאֱנֹק Jeremiah 51:52; Infinitive construct אֱנֹק Ezekiel 26:15, both of groaning of wounded (חָלָל).
Niph`al id., in mourning, lamentation; Infinitive construct הֵאָנֵק Ezekiel 24:17 "" עָשָׂה אֵבֶל); Participle נֶאֱנָקִים Ezekiel 9:4 ("" נֶאֱנָחִים followed by עַל.