Noun, Adverb (fukushi)
uprooting; pulling up (a plant) by the roots
その植物を根こそぎ引き抜きなさい。Pull the plant up by the roots. Noun
eradicating; rooting out
as 〜にする
Adverb (fukushi)
all (destroyed, stolen, etc.); completely; entirely; thoroughly; root and branch
Also written 根刮ぎ【ねこそぎ】