昏い[kurai] dark
昏睡[konsui] lethargy
昏睡状態[konsuijoutai] lethargic state
昏倒[kontou] swoon
昏迷[konmei] stupefaction

黄昏[tasogare] dusk
昏々[konkon] fast asleep
昏迷状態[konmeijoutai] befuddled (bewildered, confused) state
黄昏れる[tasogareru] to fade into dusk
昏冥[konmei] darkness

偏芯[henshin] eccentricity (in mechanics, electronics, etc.)
燈芯[toushin] (lamp) wick
帯芯[obishin] thick obi sash
摘芯[tekishin] thinning (buds and branches)
芯地[shinji] padding

替え芯[kaeshin] spare lead
鉛筆の芯[enpitsunoshin] lead of a pencil
硬の芯[kounoshin] hard pencil lead
林檎の芯[ringonoshin] core of an apple