意味深重[imishinchou] with profound (often hidden) meaning
奥深い[okufukai] profound
海深[kaishin] depth of the sea
疑い深い[utagaibukai] doubting
興味深い[kyoumibukai] very interesting

深ける[fukeru] to get late
根深い[nebukai] deep-rooted
思慮深い[shiryobukai] prudent
執念深い[shuunenbukai] vindictive
嫉妬深い[shittobukai] (deeply) jealous

虔しみ[tsutsushimi] modesty
虔み深い[tsutsushimibukai] discreet
不敬虔[fukeiken] impiety

虔む[tsutsushimu] to be careful
敬虔[keiken] pious
敬虔主義[keikenshugi] Pietism