Bug

バグ

bagu

(problem that needs fixing (especially in computing))

不具合

fuguai

(problem that needs fixing (especially in computing))

熱

netsu

(an enthusiasm for something)

盗聴器

tōchōki

(an electronic listening device)

虫

mushi

(a colloquial name for insect)

黴菌

baikin

(contagious illness, bacteria, virus)

盗聴器を仕掛ける

tōchōki o shikakeru

(to install an electronic listening device in)

邪魔をする

jama o suru

(to annoy)