Verse 1
How long . . . ? = Until when? Figure of speech Erotesis. App-6. Four times repeated is the Figure of speech Anaphora. App-6.
forget . . . face. Figure of speech Anthropopatheia. See Psalms 9:12, Psalms 9:17, Psalms 9:18, and Psalms 10:11, Psalms 10:12.
LORD. Hebrew. Jehovah. App-4.
Verse 2
my soul = myself (emph.) Hebrew. nephesh. App-13.
Verse 3
hear = answer.
Lighten mine eyes = Revive me.
sleep the sleep of death = sleep my last sleep. Hebrew Figure of speech Polyptoton. App-6.
Verse 5
trusted = confided. Hebrew. batah. App-69.
mercy = lovingkindness, or grace.
Verse 6
dealt bountifully with = compensated.