sip is diversely the affix of a verbal root when leṭ follows.,
The tense called लेट् or subjunctive is found in the Vedas only. When the subjunctive tense is employed, the affix सिप् is diversely added.
Thus जोषिषत्, तारिषत्, मन्दिषत्. Sometimes this augment is not employed; thus पताति दिद्युत् उदधिं ज्यावयाति. Thus in Rig Veda (I. I. 2), वक्षति is an example of लेट् with सिप् ॥,