athlete's foot; tinea pedis
Medical term for a common fungal infection of the feet. Often treated with topical antifungals.
My athlete's foot wouldn't go away, so I went to a dermatologist.
I got athlete's foot from walking barefoot by the pool.
water boatman; Hesperocorixa distanti
Aquatic insect; usually written in kana. The scientific name Hesperocorixa distanti is a specific species.
I found a water boatman in the pond.
aquatic sowbug; Asellus hilgendorfi
A small freshwater crustacean; usually written in kana. Asellus hilgendorfi is a specific species.
When I turned over a rock on the riverbed, there was an aquatic sowbug.
Standard kanji spelling for athlete's foot; also used for the aquatic insects.
Kana spelling is usual for the aquatic insect senses.
Compound of 水 (mizu, 'water') and 虫 (mushi, 'bug, insect'). The athlete's foot sense likely comes from the idea of a 'water bug' causing a skin condition, or from the moist environment where the fungus thrives. The aquatic insect senses are literal 'water bugs'.