accusative singular neuter; a compound noun formed from thina + middha + nīvaraṇa
Analysis. Compound of thina (sluggishness, sloth), middha (torpor, drowsiness), and nīvaraṇa (that which covers over, hindrance). Together they form one of the pañcnīvaraṇa (five hindrances) that obstruct meditative progress in Buddhist practice.
Etymology. Thina and middha are near-synonyms for mental dullness; nīvaraṇa is ni- (down, into) + varaṇa (covering, obstruction), literally "covering over". The pair thina-middha appears in Sanskrit texts and represents two shades of mental sluggishness—sloth as inactivity and torpor as drowsiness.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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