後ろ楯[ushirodate] backing
小楯[kodate] small shield
楯籠る[tatekomoru] to barricade oneself in
楯つく[tatetsuku] to oppose

醜の御楯[shikonomitate] the humble shield of our Sovereign Lord
楯籠り[tatekomori] shutting oneself in (one's room, etc.)
楯鱗[junrin] placoid scale
楯状火山[tatejoukazan] shield volcano

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