He is a perfectionist, and his approach to work is very strict.

He is immersed in the study of panmagic squares.

His performance was perfect and without blemish.

In mathematics, a perfect number refers to a number where the sum of its divisors, excluding the number itself, equals the number.

This fish is completely farmed, and no capture is done in the natural environment.

This programming language is said to be Turing complete.

A mass noun refers to a noun that cannot be counted.

He is an expert in ethology, and his research is highly regarded worldwide.

He is always joking around during class.

His irregular lifestyle is having a negative impact on his health.