Root for weakness and bending. Gives English "weak", Old Norse veikr.
bel-“strong, powerful”bʰerǵʰ-₂“high, elevated”bʰosos“bare, naked”deru-₂“firm, solid, steadfast (as a tree)”dlh₁gʰó-“long, extended”dʰer-“to hold firm, to support”gʷerh₂-“to praise, to welcome, grateful”gʷreh₂-“heavy, weighty”