noun
muddy road
A road or path that is muddy, often after rain or in wet conditions.
雨上がりのぬかるみ道を歩くのは大変だ。
Walking on a muddy road after the rain is tough.
ぬかるみ refers to muddy ground or a muddy spot in general, while ぬかるみ道 specifically means a muddy road or path.
Compound of ぬかるみ (muddy ground) and 道 (road). The derivation of ぬかるみ is uncertain, but it is related to the verb ぬかる (to be muddy).