To snarl or growl.
Gnarly.
Snow or an ocean wave.
To make a squawking noise; to yell, scream, or call out shrilly.
To produce a warning message, indicating a possible error.
To set or transmit a four-digit transponder code. (Normally followed by the specific code in question.)
To report an infraction; to rat on or tattle; to disclose a secret.
To speak out; to protest.
A complaint or objection.
A four-digit transponder code used by aircraft for identification or transmission of emergency signals.
A warning message indicating a possible error.
An issue or complaint related to aircraft maintenance.
The American night heron.
A shrill noise, especially made by a voice or bird; a yell, scream, or call.