ex·tol also ex·toll 
(ĭk-stōl)
(ĭk-stōl)tr.v. ex·tolled, ex·tol·ling, ex·tols also ex·tolled or ex·toll·ing or ex·tolls
To praise highly; exalt. See Synonyms at praise.
[Middle English extollen, from Latin extollere, to lift up, praise : ex-, up from; see EX- + tollere, to lift; see telə- in the Appendix of Indo-European roots.]
ex·toller n.
ex·tolment n.