Dubbha (& dūbha) (adj.) [Sk. dambha, see dubbhati] deceiving, hurting, trying to injure Vin ii.203 (=It 86 where dubbhe); Pv ii.93 (mitta˚). adubbha one who does not do harm, harmless Pv ii.98 (˚pāṇin=ahiŋsakahattha). As nt. harmlessness, frankness, friendliness, good -- will Vin i.347 (adrūbhāya, but cp. vv. ll. p. 395: adubbhaya & adrabbhāvāya); S i.225 (adubbhāya trustily); J i.180 (id. as adūbhāya); spelt wrongly adrūbhaka (for adubbhaka, with v. l. adrabhaka in expl. of adubbha -- pāṇin) at J vi.311. Note: dabhāya (dat.) is also used in Sk. in sense of an adv. or infinitive, which confirms the etymology of the word. Cp. dobha.

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