Strong's Greek #2726
κατήφειαν

Englishman's Concordance (References)

κατήφειαν katēpheian — 1 Occurrence

James 4:9 - N-AFS
GRK:χαρὰ εἰς κατήφειαν
NAS: into mourning and your joy to gloom.
KJV: [your] joy to heaviness.
INT: joy to gloom