the spoke of a wheel DN.ii.17 (sahass’ âra adj with thousand spokes), cp. Mil.285; Ja.iv.209; Ja.vi.261; Mil.238; Dhp-a.ii.142; Vv-a.106 (in allegorical etym of arahant = saṃsāra-cakkassa arānaṃ hatattā “breaker of the spokes of the wheel of transmigration”) = Pv-a.7 (has saṃsāra-vaṭṭassa); Vv-a.277.
Vedic ara fr. ṛ; ṛṇoti; see etym. under appeti & cp. more esp. Lat. artus limb, Gr.; α ̔́ρμα chariot, also P aṇṇava