Wiktionary
augmentless
a. (cx grammar English) lacking augment
Usage examples of "augmentless".
But since augmentless perfects seem to be permissible, the easiest solution must be to simply omit the augment in the case of such verbs: anta- "give" becoming antië "has given", onot- "count up" becoming onótië "has counted up" (though this is also the perfect of not- "reckon"!