A primitive root; properly, to inclose (as a room), i.e. (by analogy,) to beset (as in a siege) -- enter a privy chamber.
Englishman's Concordance
1) (Qal) to encompass, surround, enclose Part of Speech: verb A Related Word by BDB/Strong’s Number: a primitive root Same Word by TWOT Number: 612
Brown-Driver-Briggs
[חָדַר] verbsurround, enclose (Phoenician in derivatives; Arabic II. conceal, curtain concealing a person, chamber, house, or tent as concealing some one; Ethiopic dwell; see also following) **Phoenician is only חדר, חדרת (temple or sepulchral) chamber (Lzb271 Cooke126); Ezekiel 21:19 is best explained from Syriac go about, surround, Syriac around. It seems uncertain whether חֶדֶר, Phoenician חדרchamber, Arabic curtain, chamber, tent, etc., are (ultimately) from this √ (as something surrounding); or (Buhl) from II. חדר= II. conceal behind curtain, conceal, confine, IV. conceal oneself, also abide, stay, remain behind (Land707f.), Ethiopic abide, dwell (Driver, privately, Nov. 1905). — only
Qal
Participle feminine singular הַחֹדֶ֫רֶת לָהֶםEzekiel 21:19that which surroundeth them (of the sword), — so ᵑ6 Thes Sm Co Da VB.
Ezekiel 21:14 HEB:חָלָ֣ל הַגָּד֔וֹל הַחֹדֶ֖רֶת לָהֶֽם׃ NAS: slain, which surrounds them, KJV: [men that are] slain, which entereth into their privy chambers. INT: slain the great surrounds