Sniggered
Sniggered is the past tense of the verb "snigger." To snigger means to give a short, quiet, and suppressed laugh, often indicating contempt, derision, or amusement at something considered improper or ridiculous. It is characterized by a choked or stifled sound, distinguishing it from a loud or open laugh. The act of sniggering can convey a sense of superiority or judgment on the part of the person doing the sniggering.
The word snigger is of imitative origin, suggesting the sound it describes. It is often used in