1. to roar, shout, thunder, to shout or roar at (c. acc.) Snp.831 (shouting or railing = gajjanto uggajjanto Mnd.172); ger. abhigajjiya thundering Cp.iii.10#8.
2. hum, chatter, twitter (of birds); see abhigajjin.

abhi + gajjati from garj, sound-root, cp. P. gaggara