Psa. 136:26 KJV (With Strong’s)

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26
O give thanks
yadah (Hebrew #3034)
used only as denominative from 3027; literally, to use (i.e. hold out) the hand; physically, to throw (a stone, an arrow) at or away; especially to revere or worship (with extended hands); intensively, to bemoan (by wringing the hands)
KJV usage: cast (out), (make) confess(-ion), praise, shoot, (give) thank(-ful, -s, -sgiving).
Pronounce: yaw-daw'
Origin: a primitive root
unto the God
'el (Hebrew #410)
strength; as adjective, mighty; especially the Almighty (but used also of any deity)
KJV usage: God (god), X goodly, X great, idol, might(-y one), power, strong. Compare names in "-el."
Pronounce: ale
Origin: shortened from 352
of heaven
shamayim (Hebrew #8064)
from an unused root meaning to be lofty; the sky (as aloft; the dual perhaps alluding to the visible arch in which the clouds move, as well as to the higher ether where the celestial bodies revolve)
KJV usage: air, X astrologer, heaven(-s).
Pronounce: shaw-mah'-yim
Origin: dual of an unused singular shameh {shaw-meh'}
: for his mercy
checed (Hebrew #2617)
kindness; by implication (towards God) piety: rarely (by opposition) reproof, or (subject.) beauty
KJV usage: favour, good deed(-liness, -ness), kindly, (loving-)kindness, merciful (kindness), mercy, pity, reproach, wicked thing.
Pronounce: kheh'-sed
Origin: from 2616
endureth for ever
`owlam (Hebrew #5769)
from 5956; properly, concealed, i.e. the vanishing point; generally, time out of mind (past or future), i.e. (practically) eternity; frequentatively, adverbial (especially with prepositional prefix) always
KJV usage: alway(-s), ancient (time), any more, continuance, eternal, (for, (n-))ever(-lasting, -more, of old), lasting, long (time), (of) old (time), perpetual, at any time, (beginning of the) world (+ without end). Compare 5331, 5703.
Pronounce: o-lawm'
Origin: or lolam {o-lawm'}
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Cross References

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J. N. Darby Translation

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26
Give ye thanks unto the *God of the heavens; for his loving-kindness endureth for ever.