1 Corinthians 16:22 If any man love not the Lord Jesus Christ, let him be Anathema Maranatha.
Strongs Number: G331
Orig: from 394; a (religious) ban or (concretely) excommunicated (thing or person):–accused, anathema, curse, X great. G394
Use: TDNT-1:354,57 Noun Neuter
Heb Strong: H2764
1) a thing set up or laid by in order to be kept
1a) specifically, an offering resulting from a vow, which after being consecrated to a god was hung upon the walls or columns of the temple, or put in some other conspicuous place
2) a thing devoted to God without hope of being redeemed, and if an animal, to be slain; therefore a person or thing doomed to destruction
2a) a curse
2b) a man accursed, devoted to the direst of woes
Pronounce: mar’-an ath’-ah
Strongs Number: G3134
Orig: mar’-an ath’-ah, of Chaldee origin (meaning our Lord has come); maranatha, i.e. an exclamation of the approaching divine judgment:–Maran-atha.
1) our Lord cometh or will come
So basically, If any man doesn’t love the Lord Jesus Christ.. then let him be cursed when the Lord Jesus Christ returns.