御爺さん[ojiisan] grandfather
老爺[shinpu] one's father
狸爺[tanukijijii] cunning old man
好々爺[koukouya] good-natured old man
爺が背[hizaragai] chiton (any marine mollusk of the class Polyplacophora)

エロ爺[erojijii] dirty old man
糞爺[kusojijii] old man
爺さん[jiisan] grandfather (may be used after name as honorific)
洞爺湖サミット[touyakosamitto] G8 Hokkaido Toyako Summit

穢い[kitanai] dirty
穢す[kegasu] to pollute
穢らわしい[kegarawashii] filthy
穢れ[kegare] uncleanness
穢れる[kegareru] to be violated

穢多[eta] one group comprising the lowest rank of Japan's Edo-period caste system (people whose work usually involved handling human bodies or animal carcasses)
穢土[edo] this impure world (as opposed to the pure land)
汚穢[owai] night soil
腹穢い[haragitanai] black-hearted
意地穢い[ijikitanai] gluttonous