It is cunctate, more familiar in its noun form cunctator.    From Wordnik.com.  [Word Fugitives] Reference

But no one was ever more undecided than the famous cunctator.    From Wordnik.com.  [The Companions of Jehu] Reference

The foregoing is irrefutable evidence that the fool-killer is enacting the rôle of cunctator.    From Wordnik.com.  [The Complete Works of Brann the Iconoclast, Volume 10] Reference

cunctator, eu.    From Wordnik.com.  [Microsoft Cunctator] Reference