wood, tree

Have the PIE/IE forms been discussed earlier? I shall be thankful
for message references since a search in the archives was not
fruitful.

Bartleby: deru, dreu-. To be firm, solid, steadfast; hence
specialized senses "wood," "tree," and derivatives referring to
objects made of wood. Derivatives include tree, trust, betroth,
endure, and druid. 1. Suffixed variant form *drew-o-. a. tree, from
Old English tre_ow, tree, from Germanic *trewam

Some cognates in indic:

ad.aru = twig; ad.iri = small and thin branch of a tree; ad.ari =
small branches (Ka.); ad.aru = a twig (Te.)(DEDR 67).

d.ar = a branch of a tree; dare = a tree, a plant; to grow, to grow
well; ban: darelena = it did not grow well; toa dare = mother, the
support of life (Santali) dare kudrum = cultivated for its fibre,
hibiscus cannabinus (Santali) de_vada_ru = Himalayan cedar (MBh.);
de_vada_ruka (Pali); de_vada_ru (Pkt.); di_a_r (K.); dya_r (Ku.);
dya_ra_n.i deodar forest (Ku.); dewa_r (N.)(CDIAL 6531). dru 'wood'
(Skt.); druma 'tree' (Skt.); duma (Pali)