subdubito

sub-dŭbĭto, āre, v. n., to be a little doubtful or undecided, to have some hesitation (Ciceron.):

antea subdubitabam,

Cic. Att. 14, 15, 2:

significabant tuae litterae, te subdubitare, quā essem erga illum voluntate,

id. Fam. 2, 13, 2.