Thy throne
kicce' (kis-say')
covered, i.e. a throne (as canopied) -- seat, stool, throne.
is established
kuwn (koon)
to be erect (i.e. stand perpendicular); hence (causatively) to set up, in a great variety of applications
of old
'az (awz)
at that time or place; also as a conjunction, therefore -- beginning, for, from, hitherto, now, of old, once, since, then, at which time, yet.
thou art from everlasting
`owlam (o-lawm')
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