根

Architecture

underpinning; splicing (e.g. a rotting post)

lateral root

luck, steadfastness and patience (the three keys to achieving success)

Mathematics

square root

Mathematics

imaginary root

excavation (as preparation for construction)

uprooting

madder root

Sumo

conservative calligraphy style used to write rankings

root clump

Noun or verb acting prenominally; Anatomy

tarsal

kanji "person" radical at top

Music

root (of a chord)

saw-tooth roof; sawtooth roof

Welsh onion miso soup

digital root

scaffolding and temporary roof placed around a shrine, temple, etc. undergoing repair; protective scaffolding

arête; sharp ridge

Adenostemma lavenia (species of flowering plant)

Botany

radical leaf; rosette; basal leaf

sweet rocket (Hesperis matronalis); dame's rocket; dame's violet; damask violet

Chinese violet cress (Orychophragmus violaceus)

Anatomy

dorsal root; posterior root

Biology

rhizosphere

Botany

rhizophore