paṭigha: - 1. In an ethical sense, it means: 'repugnance', grudge, resentment, anger, and is a synonym of byāpāda, 'ill-will' (s. nīvaraṇa) and dosa, 'hate' (s. mūla). It is one of the proclivities (anusaya, q.v.).

2. '(Sense-) reaction'. Applied to five-sense cognition, p. occurs in the following contexts:

(a) as paṭigha-saññā, 'perception of sense-reaction', said to be absent in the immaterial absorptions (s. jhāna 5). Alternative renderings: resistance-perception, reflex-perception;

(b) as paṭigha-samphassa, '(mental) impression caused by 5fold sensorial reaction' (D. 15); s. phassa;

(c) as Sappaṭigha-rūpa, 'reacting corporeality', and appaṭigha, 'not reacting', which is an Abhidhammic classification of corporeality, occurring in Dhs. 659, 1050. Sappaṭigha are called the physical sense-organs as reacting (or responding) to sense stimuli; and also the physical sense-objects as impinging (or making an impact) on the sense-organs. All other corporeality is appaṭigha, non-reacting and non-impinging. These 2 terms have been variously rendered as resistant and not, responding and not, with and without impact.

Buddhist Dictionary, Manual of Buddhist Terms and Doctrines, by NYANATILOKA MAHATHERA

paṭigha : [m.] anger; repulsion; collision.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Paṭigha (m. & nt.) [paṭi+gha, adj. suffix of ghan=han, lit. striking against] 1. (ethically) repulsion, repugnance, anger D i.25, 34; iii.254, 282; S i.13; iv.71, 195, 205, 208 sq.; v.315; A i.3, 87, 200; Sn 371, 536; Dhs 1060; Miln 44; DA i.22. -- 2. (psychologically) sensory reaction D iii.224, 253, 262; S i.165, 186; A i.41, 267;ii.184; Dhs 265, 501, 513, 579; VbhA 19. See on term Dhs trsln 72, 204, 276 and passim. -- appaṭigha see separately s. v. Note. How shall we read paṭighaṭṭha nānighaŋso at DhsA 308? (paṭigha -- ṭṭhāna -- nighaŋso, or paṭighaṭṭana -- nighaŋso?)

Pali-English Dictionary, TW Rhys Davids, William Stede,