After the verb gup 'to protect', caṅ is optionally the substitute of cli in the chandas (Vedas).,
This rule applies where the root गुप् does not take the affix आय (II. I. 28). As इमान् नो मित्रावरुणौ यत् गृहान् अजुगुपतम् 'Mitra Varuna protected these our houses'. The other forms are अगौप्तम्, अगोपिष्टम् or आगोपायिष्टम्. In the secular literature, the latter three forms are used, but not the first.,