'Tree' shares its PIE root with 'true' — both from *deru- (firm, solid). Reliability rooted in wood.
A perennial woody plant having a main trunk and branches forming a distinct elevated crown, typically growing to a considerable height.
The word 'tree' comes from Old English 'trēow,' from Proto-Germanic *trewą, from Proto-Indo-European *drew- or *dóru, meaning 'wood, tree, oak.' This root also gave rise to 'true' and 'trust' (from the idea of being solid as wood/oak) and has cognates across the Indo-European world: Greek 'dóry' (wooden spear, beam), Sanskrit 'dāru' (wood), Welsh 'derwen' (oak), and Russian 'derevo' (tree). The PIE root may