1. To make a low hoarse noise in the throat, as a frog or a raven; to grumble; to forebode evil.

2. The low harsh sound uttered by a frog or a raven.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• cayak,
• greak,
• crobar,
• crrek,
• crous,
• crakc,
• crak,
• yrok,
• creank,
• creck,
• criag,
• craky,
• colak,
• cruek,
• arock,
• croock,
• coook,
• choak,
• crink,
• crouk

• crick,
• crock,
• Craigue,
• crease,
• Crooke,
• creaky,
• cracow,
• craggy,
• croaks,
• creagh,
• Crooks,
• cragg,
• crake,
• crash,
• Creasy,
• croke,
• creasey,
• craze,
• crack,
• crazy,
• Craig,
• crook,
• creach,
• craigie,
• creek,
• crago,
• crego,
• croskey,
• Crase,
• Crays,
• creak,
• crass,
• crace,
• crag,
• Crisco,
• cloak,
• croaky,
• crax.

The adverb for the word "croak" is "croakily".

The adjective form of the word "croak" is "croaky".

The plural of the "croak" can be the "croaks".

The singular of the "croak" can be the "croak".