Thāvara¹

adjective “standing still,” immovable (opp to tasa) firm, strong (Ep. of an Arahant: Kp-a.245; Dhp-a.iv.176. Always in connection with tasa, contrasting or comprising the movable creation (animal world) & the immovable (vegetable world), e.g. Snp.394 (“sabbesu bhūtesu nidhāya daṇḍaṃ ye thāvarā ye ca tasanti loke”); Iti.32 (tasaṃ vā thāvaraṃ vā). See tasa for ref.

Vedic sthāvara, from sthā, cp. sthavira, Gr. σταυρός post, Lat. re-stauro, Goth. stana judgment & stojan to judge

Thāvara²

neuter old age Pv-a.149 (thāvari-jiṇṇa in expl. of therī, otherwise jarā-jiṇṇa Should we read thāvira-jiṇṇa?).

from thavira = thera, old