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

飽き性[akishou] fickle nature
見飽きる[miakiru] to be tired of looking at
市場の飽和状態[shijounohouwajoutai] market saturation
飽気[akke] taken aback
飽かす[akasu] to bore

飽かず[akazu] with untiring zeal
飽き飽き[akiaki] sick of
飽くことを知らない[akukotowoshiranai] insatiable
飽く迄[akumade] to the end
飽食[houshoku] gluttony