durAvagAha
durāvagāha , adj. (for durava°), hard to fathom : samudrakalpa … gambhīra-durāvagāhatvāt LV 424.11 (prose). See § 3.10 . This is ignored by Weller 39 , tho he refers to two other cases of apparent vowel-lengthening in the following lines (see l. c. ). The -ā- here may have been carried over from some passage in vs where it was metrically required.