h₂erd-

“to rise, high, grow tall”

Debatedgrowthplantheight

Source of Latin arbor, English arbor, arboretum

Root for growing tall, yielding Latin arbor (tree) and English arbor, arboretum.‌‌‌‍‌‌‌‌‌‍‌‍‌‌‌‍‍‍‌‌‍‌‌‌‌‍‌‍‍‌‌‍

bheh₂ǵ-es-“beech tree, its nut”bʰeHg-mn̥“beech tree (nominal)”bʰew-mn̥-“growth, becoming, existence”bʰew-tú-“growth, nature, coming-to-be”bʰleh₃-“to bloom, flourish, flower”dʰeh₁-l-₂“to bloom, nurse, nourish (variant)”dheHl-“to bloom, be green”dóru“tree, wood, oak”