That the slayer
ratsach  (raw-tsakh')
to dash in pieces, i.e. kill (a human being), especially to murder -- put to death, kill, (man-)slay(-er), murder(-er).
that killeth
nakah  (naw-kaw')
to strike (lightly or severely, literally or figuratively)
any person
nephesh  (neh'-fesh)
a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
shgagah  (sheg-aw-gaw')
a mistake or inadvertent transgression -- error, ignorance, at unawares; unwittingly.
and unwittingly
da`ath  (dah'-ath)
knowledge -- cunning, (ig-)norantly, know(-ledge), (un-)awares (wittingly).
may flee
nuwc  (noos)
to flit, i.e. vanish away (subside, escape; causatively, chase, impel, deliver)
thither and they shall be your refuge
miqlat  (mik-lawt')
an asylum (as a receptacle) -- refuge.
from the avenger
ga'al  (gaw-al')
to redeem (according to the Oriental law of kinship), i.e. to be the next of kin (and as such to buy back a relative's property, marry his widow, etc.);
of blood
dam  (dawm)
blood (as that which when shed causes death) of man or an animal; by analogy, the juice of the grape; figuratively (especially in the plural) bloodshed (i.e. drops of blood)