I have longed
ta'ab (taw-ab')
to desire -- long.
for thy salvation
yshuw`ah (yesh-oo'-aw)
something saved, i.e. (abstractly) deliverance; hence, aid, victory, prosperity -- deliverance, health, help(-ing), salvation, save, saving (health), welfare.
O LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
and thy law
towrah (to-raw')
a precept or statute, especially the Decalogue or Pentateuch -- law.
is my delight
sha`shua` (shah-shoo'-ah)
enjoyment -- delight, pleasure.