They have corrupted
shachath (shaw-khath')
to decay, i.e. (causatively) ruin -- batter, cast off, corrupt(-er, thing), destroy(-er, -uction), lose, mar, perish, spill, spoiler, utterly, waste(-r).
themselves their spot
m'uwm (moom)
as if passive participle from an unused root probably meaning to stain; a blemish (physically or morally) -- blemish, blot, spot.
is not the spot of his children
ben (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
they are a perverse
`iqqesh (ik-kashe')
distorted; hence, false -- crooked, froward, perverse.
and crooked
pthaltol (peth-al-tole')
tortuous (i.e. crafty) -- crooked.
generation
dowr (dore)
a revolution of time, i.e. an age or generation; also a dwelling -- age, evermore, generation, (n-)ever, posterity.