I would really be grateful if someone can analyse the two words
taaya.m velaaya.m below.

Atha kho bhagavaa etamattha.m viditvaa taaya.m velaaya.m ima.m
udaana.m udaanesi

This phrase occurs in the Udaana suttas. Velaaya.m could be velaa
+ aya.m (= this time or this occasion) but I can't make out
taaya.m

Thanks
Cheang Oo