凹ます[hekomasu] to dent
凹ませる[hekomaseru] to dent
凹まる[kubomaru] to be low (as a hollow)
凹む[hekomu] to be dented
凹める[kubomeru] to hollow out

凹レンズ[ourenzu] concave lens
凹眼[ougan] cavernous eyes
凹眼鏡[ougankyou] concave glasses
凹型[ougata] concavity

隣の芝生は青い[tonarinoshibafuhaaoi] the grass is always greener on the other side
近隣[kinrin] neighbourhood
近隣諸国[kinrinshokoku] neighboring countries
先隣[sakitonari] next door but one
善隣[zenrin] good neighbour

善隣友好[zenrinyuukou] neighbourly friendship
又隣[matadonari] second door from here
両隣[ryoudonari] both sides
隣り[tonari] neighbor (neighbour)
隣家[rinka] neighbouring house