General "crazy":
* பைத்தியம் (paithiyam): This is a common word for "crazy" or "mad."
* விபரீதம் (viparītam): This means "abnormal" or "unusual," and can be used to describe someone acting crazy.
* நினைவாற்றல் குறைபாடு (ninaivāṟṟal kuraipāṭu): This literally means "memory impairment," but it can also be used to describe someone who is mentally unstable.
"Crazy" in the sense of "excited" or "enthusiastic":
* கிறுக்கு (kirukku): This can be used to describe someone who is passionate or obsessed with something.
* பேய் (pēy): This literally means "ghost," but it can also be used to describe someone who is very energetic or wild.
"Crazy" in the sense of "foolish" or "stupid":
* மூடர் (mūṭar): This means "foolish" or "ignorant."
* பொறுக்க முடியாத (porukkamudiyādha): This means "unbearable" or "unmanageable," and can be used to describe someone who is acting foolishly.
"Crazy" in the sense of "insane":
* மனநலம் பாதிக்கப்பட்ட (mananallam pātikkappatta): This means "mentally affected," and is a more formal way of saying "insane."
The best way to choose the right word depends on the specific situation and the tone you want to convey.