From an unused root probably meaning to enclose; a hog (perhaps as penned) -- boar, swine.
Englishman's Concordance
1) hog, swine, boar 1a) swine (as forbidden food) 1b) wild boar Part of Speech: noun masculine A Related Word by BDB/Strong’s Number: from an unused root probably meaning to enclose Same Word by TWOT Number: 637a
Brown-Driver-Briggs
חֲזִירnoun masculinePsalm 80:14swine, boar (Late Hebrew id.; Aramaic חֲזִירָא, Arabic (Aramaic Loan-word according to Frä110, yet see LagBN 113); Ethiopic : (only once;=wild boar), see HomNS 319 f. 358, 385) — always stative absolute, 4 t. with article ׳הַח; —
Leviticus 11:7 HEB: וְאֶת־ הַ֠חֲזִיר כִּֽי־ מַפְרִ֨יס NAS:and the pig, for though it divides KJV:And the swine, though he divide INT:and the pig for divides
Deuteronomy 14:8 HEB: וְאֶת־ הַ֠חֲזִיר כִּֽי־ מַפְרִ֨יס NAS:The pig, because it divides KJV:And the swine, because it divideth INT:the pig because divides
Psalm 80:13 HEB: יְכַרְסְמֶ֣נָּֽה חֲזִ֣יר מִיָּ֑ עַ seg>ר וְזִ֖יז NAS:A boar from the forest eats it away KJV:The boar out of the wood doth waste INT: eats A boar the forest and whatever
Proverbs 11:22 HEB:זָ֭הָב בְּאַ֣ף חֲזִ֑יר אִשָּׁ֥ה יָ֝פָ֗ה NAS: of gold in a swine's snout KJV: of gold in a swine's snout, INT: of gold snout A swine's woman a beautiful
Isaiah 65:4 HEB:הָאֹֽכְלִים֙ בְּשַׂ֣ר הַחֲזִ֔יר [וּפְרַק כ] NAS: Who eat swine's flesh, KJV: which eat swine's flesh, INT: eat flesh swine's broth of unclean
Isaiah 66:3 HEB:מִנְחָה֙ דַּם־ חֲזִ֔יר מַזְכִּ֥יר לְבֹנָ֖ה NAS: a grain offering [is like one who offers] swine's blood; KJV: an oblation, [as if he offered] swine's blood; INT: offering blood swine's burns incense
Arabic 
(Aramaic Loan-word according to Frä110, yet see LagBN 113); Ethiopic 
: (only once;=wild boar), see HomNS 319 f. 358, 385) — always stative absolute, 4 t. with article ׳הַח; —