He shall not make himself unclean
tame'  (taw-may')
to be foul, especially in a ceremial or moral sense (contaminated) -- defile (self), pollute (self), be (make, make self, pronounce) unclean, utterly.
for his father
'ab  (awb)
father, in a literal and immediate, or figurative and remote application) -- chief, (fore-)father(-less), patrimony, principal. Compare names in Abi-.
or for his mother
'em  (ame)
a mother (as the bond of the family); in a wide sense (both literally and figuratively) -- dam, mother, parting.
for his brother
'ach  (awkh)
a brother (used in the widest sense of literal relationship and metaphorical affinity or resemblance (like 1) -- another, brother(-ly); kindred, like, other.
or for his sister
'achowth  (aw-khoth')
a sister (used very widely, literally and figuratively) -- (an-)other, sister, together.
when they die
maveth  (maw'-veth)
death (natural or violent); concretely, the dead, their place or state (hades); figuratively, pestilence, ruin -- (be) dead(-ly), death, die(-d).
because the consecration
nezer  (neh'-zer)
consecration, crown, hair, separation.
of his God
'elohiym  (el-o-heem')
angels, exceeding, God (gods)(-dess, -ly), (very) great, judges, mighty.
is upon his head
ro'sh  (roshe)
the head (as most easily shaken), whether literal or figurative (in many applications, of place, time, rank, itc.)