absolutive of abhinandati
Analysis. abhi- (toward, bearing down on) + nandi- (to be pleased, to approve) + -tvā (absolutive suffix). The prefix abhi- intensifies the sense of approval, turning simple pleasure into active endorsement or applause directed at something.
Etymology. √nand (to be pleased, to rejoice) is cognate with Sanskrit nandati and ultimately with Indo-European roots denoting brightness and enjoyment (compare English "enjoy" in the sense of taking pleasure). The prefix abhi- (toward and over) gives the sense of bearing down on, hence approval directed outward.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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