As for man
'enowsh  (en-oshe')
a mortal; hence, a man in general (singly or collectively)English versions, especially when used in apposition with another word.

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his days
yowm  (yome)
a day (as the warm hours),

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are as grass
chatsiyr  (khaw-tseer')
grass; also a leek (collectively) -- grass, hay, herb, leek.

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as a flower
tsiyts  (tseets)
glistening, i.e. a burnished plate; also a flower (as bright-colored); a wing (as gleaming in the air) -- blossom, flower, plate, wing.

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of the field
sadeh  (saw-deh')
from an unused root meaning to spread out; a field (as flat) -- country, field, ground, land, soil, wild.

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so he flourisheth
tsuwts  (tsoots)
to twinkle, i.e. glance; by analogy, to blossom (figuratively, flourish) -- bloom, blossom, flourish, shew self.New American Standard Bible
As for man, his days are like grass; As a flower of the field, so he flourishes.

King James Bible
As for man, his days are as grass: as a flower of the field, so he flourisheth.

Holman Christian Standard Bible
As for man, his days are like grass-- he blooms like a flower of the field;

International Standard Version
A person's life is like grass— it blossoms like wild flowers,

NET Bible
A person's life is like grass. Like a flower in the field it flourishes,

Aramaic Bible in Plain English
A son of man is like the grass in its days and like a flower of the field so he springs up.

GOD'S WORD® Translation
Human life is as short-lived as grass. It blossoms like a flower in the field.

King James 2000 Bible
As for man, his days are as grass: as a flower of the field, so he flourishes.Psalm 103:15
Psalm 103:15 NIV
Psalm 103:15 NLT
Psalm 103:15 ESV
Psalm 103:15 NASB
Psalm 103:15 KJV