a:- a

rarely an expletive (cf. a-kupya, a-pUpa). According to Pāṇ. vi, 2, 161, the accent may be optionally either on the first or last syllable in certain compounds formed with a (as a/-tIkzRa or a-tIkzRa/, a/-Suci or a-Suci/, a/n-anna or an-anna/)