From chaqar; examination, enumeration, deliberation -- finding out, number, (un-)search(-able, -ed, out, -ing).
see HEBREW chaqar
H2714. cheqer
חֵ֫קֶר noun masculineJudges 5:16 searching, thing (to be) searched out; — absolute חֵ֫קֶר Job 5:9 8t.; construct id. 8:8 2t.; plural construct חִקְרֵי Judges 5:16; — לֵב חִקְרֵי 5:16 searchings, questionings of heart; Job 11:7 canst thou reach ׳ח אֱלוֺהַּ i.e. what is to be explored in him, the whole range of his nature, so תהום ׳ח 38:16 the range of the deep; especially ח ׳אֵין i.e. it is unsearchable 5:9; 9:10; Psalm 145:3; Proverbs 25:3; Isaiah 40:28, compare ח ׳לא Job 34:24; 36:26; ׳ח אבותם 8:8 i.e. thing searched out by their fathers.