characteristics. Every person has a special quality
sense of humor
Every person has a special quality
To say "None is equal to him" (or her) means you feel the person is of high morality, standards, quality or special, etc. It means you think he is so special that there is no one who can measure up to him.
Neptunium hasn't a unique, special quality.
Yeah I know what Ice King means... a BIG NERD!
"Allorial" is not a word in the English language and does not mean anything special.
The Latin term "sui generis" means in English "of its/his/her own kind". It therefore means "having unique characteristics". It means that one/ something has very special characteristics.
The term you are looking for is "stability." Stability refers to the quality of being firmly established, constant, or unchanging.
The term is "de mauvais goût". The word "quétaine" often used in Québec, means kitsch: something that appeals to popular or lowbrow taste and is often of poor quality. or "vulgaire", which means "tasteless".
There is no special term "ac" in math, as far as I know. However, in physics, "AC" means "alternating current".
A cachet is a seal of a letter, a special quality or prestige or a commemorative stamped design on an envelope.
The term merchantable good essentially means that a product is in the correct quality and condition to be sold. It is not broken, spoiled, or a fake.