PTS Pali-English dictionary - The Pali Text Society's Pali-English dictionary
Kukkucca,[kud-kicca] 1.bad doing,misconduct,bad character.Def.kucchitaṁ kataṁ kukataṁ tassa bhāvo kukkuccaṁ Vism.470 & Bdhd 24; -- Various explanations in Nd2 on Sn.1106=Dhs.1160,in its literal sense it is bad behaviour with hands and feet (hattha-pada°) J.I,119=DA.I,42 (in combn with ukkāsita & khipitasadda); hattha° alone J.II,142.-- 2.remorse,scruple,worry.In this sense often with vippaṭissāra; and in conn.w.uddhacca it is the fourth of the five nīvaraṇas (q.v.) Vin.I,49; IV,70; D.I,246; S.I,99; M.I,437; A.I,134=Sn.1106; A.I,282; Sn.925; Nd2 379; DhA.III,483; IV,88; Sdhp.459; Bdhd 96.-- na kiñci k°ṁ na koci vippaṭissāreti “has nobody any remorse?” S.III,120=IV.46.The dispelling of scrupulousness is one of the duties and virtues of a muni:k°ṁ vinodetuṁ A.V,72; k.pahāya D.I,71=A.II,210=Pug.59; chinnakukkucca (adj.) free from remorse M.I,108; khīṇāsava k°-vūpasanta S.I,167=Sn.82.-- akukkucca (adj.) free from worry,having no remorse Sn.850.Kukkuccaṁ kurute (c.Gen.) to be scrupulous about J.I,377; kariṁsu DhA.IV,88; cp.kukkuccaṁ āpajjati (expl.by saṅkati) J.III,66.(Page 218)
Concise Pali-English Dictionary by A.P. Buddhadatta Mahathera
kukkucca:[nt.] remorse; scruple; worry.
Buddhist Dictionary by NYANATILOKA MAHATHERA
kukkucca:lit.'wrongly-performed-ness' (ku+krta+ya),i.e.scruples,remorse,uneasiness of conscience,worry,is one of the kammically unwholesome (akusala) mental faculties (Tab.II) which,whenever it arises,is associated with hateful (discontented) consciousness (Tab.I and III,30,31).It is the 'repentance over wrong things done,and right things neglected' (Com.to A.I).Restlessness and scruples (uddhacca-kukkucca),combined,are counted as one of the 5 mental hindrances (nīvaraṇa,q.v.).