noun
deep boots; wading boots
Refers to boots that come up high on the leg, such as wading boots or tall rubber boots.
漁師は深靴を履いて川に入った。
The fisherman put on deep boots and entered the river.
雨の日は深靴が便利だ。
Deep boots are handy on rainy days.
長靴 is the common word for rubber boots or rain boots, while 深靴 specifically emphasizes the depth of the boots, often for wading.
Compound of 深 (fuka, 'deep') and 靴 (kutsu, 'shoes/boots'). The reading ふかぐつ is a straightforward combination of the kun'yomi of 深 and the on'yomi of 靴.