Psa. 102:11 KJV (With Strong’s)

My days
yowm (Hebrew #3117)
a day (as the warm hours), whether literal (from sunrise to sunset, or from one sunset to the next), or figurative (a space of time defined by an associated term), (often used adverb)
KJV usage: age, + always, + chronicals, continually(-ance), daily, ((birth-), each, to) day, (now a, two) days (agone), + elder, X end, + evening, + (for) ever(-lasting, -more), X full, life, as (so) long as (... live), (even) now, + old, + outlived, + perpetually, presently, + remaineth, X required, season, X since, space, then, (process of) time, + as at other times, + in trouble, weather, (as) when, (a, the, within a) while (that), X whole (+ age), (full) year(-ly), + younger.
Pronounce: yome
Origin: from an unused root meaning to be hot
are like a shadow
tsel (Hebrew #6738)
shade, whether literal or figurative
KJV usage: defence, shade(-ow).
Pronounce: tsale
Origin: from 6751
i that declineth
natah (Hebrew #5186)
to stretch or spread out; by implication, to bend away (including moral deflection); used in a great variety of application (as follows)
KJV usage: + afternoon, apply, bow (down, - ing), carry aside, decline, deliver, extend, go down, be gone, incline, intend, lay, let down, offer, outstretched, overthrown, pervert, pitch, prolong, put away, shew, spread (out), stretch (forth, out), take (aside), turn (aside, away), wrest, cause to yield.
Pronounce: naw-taw'
Origin: a primitive root
; and I am withered
yabesh (Hebrew #3001)
to be ashamed, confused or disappointed; also (as failing) to dry up (as water) or wither (as herbage)
KJV usage: be ashamed, clean, be confounded, (make) dry (up), (do) shame(-fully), X utterly, wither (away).
Pronounce: yaw-bashe'
Origin: a primitive root
likek grass
`eseb (Hebrew #6212)
grass (or any tender shoot)
KJV usage: grass, herb.
Pronounce: eh'seb
Origin: from an unused root meaning to glisten (or be green)

Cross References

My days.
I am withered.

J. N. Darby Translation

My days are like a lengthened-out shadow, and I, I am withered like grass.