Lexical Definition

‎עָתַם‎ ʻâtham (aw-tham) to burn ^H:V
a primitive root

be darkened.

• probably to glow, i.e. (figuratively) be desolated

1) (Niphal) to be burned up, be scorched
1a) meaning dubious

Brown-Driver-Briggs

[‎עָתַם‎] verb dubious; Niph`al Perfect 3 masculine singular ‎נֶעְתַּם‎ ‎אָ֑רֶץ‎ Isa 9:18* ( is be clogged in speech, suffocating heat, burned by heat; hence Thes scorched, but derived sense dubious; see RS^{JPhil. xiii. 61 f.}); — read perhaps ‎נִצְּתָה‎ (√ ‎יָצַת‎) is burned up, compare RS^l.c., Krochm Kit Che^Hpt.

Brown-Driver-Briggs References