Strong's Concordance

heb

saw-makh'

"sâmach"

שָׂמַח

1) to rejoice, be glad
1a) (Qal)
1a1) to rejoice
1a2) to rejoice (arrogantly), exult (at)
1a3) to rejoice (religiously)
1b) (Piel) to cause to rejoice, gladden, make glad
1c) (Hiphil) to cause to rejoice, gladden, make glad

a primitive root;

Englishman's Concordance

it and be glad their heart shall