Set
shiyth (sheeth)
to place (in a very wide application) -- apply, appoint, array, bring, consider, lay (up), let alone, look, make, mark, put (on), + regard, set, shew, be stayed, take.
a watch
shomrah (shom-raw')
watchfulness -- watch.
O LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
before my mouth
peh (peh)
the mouth (as the means of blowing), whether literal or figurative (particularly speech); specifically edge, portion or side; adverbially (with preposition) according to
keep
natsar (naw-tsar')
to guard, in a good sense (to protect, maintain, obey, etc.) or a bad one (to conceal, etc.)
the door
deleth (deh'-leth)
something swinging, i.e. the valve of a door -- door (two-leaved), gate, leaf, lid. (In Psa. 141:3, dal, irreg.).
of my lips
saphah (saw-faw')
the lip (as a natural boundary); by implication, language; by analogy, a margin (of a vessel, water, cloth, etc.)