無根 is read as むこん (mukon) and means groundless.
むこん
mukon
じじつむこん
groundless
ときなしだいこん
year-round white daikon
むこんきょ
baseless
ねなし
rootless
ねなしぐさ
duckweed
むじん
shorthandedness
むちゃ
rash
むりやり
forcibly
むり
impossible
むりょう
free (of charge)
ぶじ
good health
むしょく
without an occupation