(i) Rejoice /glad

(ii) (1) Guwl (1523) - to spin around, be joyful.

(2) Samach (8055) - to brighten up, make glad.

(iii) The joy of the Lord in it's various expressions (dance & radiant countenance)

(iv) (1) (a) 1:4

(2) (a) 1:4; 3:11