masc acc pl of upakkilesa (noun); masc loc sg of upakkilesa (noun); nt acc pl of upakkilesa (noun); nt loc sg of upakkilesa (noun)
Analysis. upa- (up close, alongside) + kkilesa (defilement, from √klis- to afflict). The concrete image is defilement pressing close, clinging to the practice: impurities that adhere alongside the work of purification.
Etymology. kkilesa from √klis-, related to Sanskrit kleśa (affliction, torment). The prefix upa- (up close, near) combines with this root of affliction to create the sense of blemishes that attach themselves alongside or within spiritual development. Not cognate with English "close" or "cluster," but the spatial imagery of nearness and adhesion is native to Pali.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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