Thambhitatta (nt.) [abstr. to thambha]=thambha 2, viz. hardness, rigidity, obduracy, obstinacy Vbh 350. Note. Quite a late development of the term, caused by a misinterpretation of chambhitatta, is "fluctuation, unsteadiness, inflation" at Dhs 965 (in def. of vāyodhātu: chambhittattaŋ [?] thambhitattaŋ. See on this Dhs. trsl. p. 242), & at Vbh 168 (in def. of vicikicchā; v.l. chambhitatta), and at Asl. 338 (of vayo). None of these meanings originally belong to the term thambha.

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