Time past, i.e. Yesterday or last night -- former time, yesterday(-night)
H570. emesh
אֶ֫מֶשׁ adverb yesterday (etymology dubious; MV after Fl De on Job 30:3 compare Sta§ 256 c derive from √ משׁה = Arabic , whence , evening; see also in Thes, & compare Assyrian mušu, night COTGloss, Ethiopic but also Arabic = Assyrian amšatu, yesterday) = last night Genesis 19:34; 31:29, 42 (אָ֑מֶשׁ); = recently 2 Kings 9:26. — Job 30:3 ׳א שׁוֺאָה is difficult & uncertain Thes MV and others darkness, gloom of wasteness, so RV, but dubious, compare Di; G. Hoffm. reads שׁ ׳אֵם = the mother of (all) the ruined ( said of the desert).
אֲמִתַּי אֱמֶת see אמן.
אַמְתַּ֫חַת see מתח.