Var. pāḳat; pīḳa (CAD P 384, AHw. 864); piqtatti, piqtāte (CAD P 393).
Akk. pīḳat (and vars.) ‘perhaps’ is commonly derived from 
piāḳu ‘to (be) narrow’. This etymology is not improbable, but one has to admit that the semantic development from ‘to (be) narrow’ to ‘perhaps’ is not self-evident.