insufficient amount of something.
but probably googling it would be the best answer
LACK of course
Lack
To be good at something could be proficient. To be bad at something could, therefore, be deficient. Deficient is an antonym for proficient.
The opposite of "being good at" something would be "being bad at" it.
deficient
no. its a type of number. as in, a number can be deficient.
deficient
to miss or be deficient = lack
to miss or be deficient = lack
To not have it, or to lack it.
lack
To not have it, or to lack it.
lack
It is Lack.
The definition of the word deficient is something that is lacking a necessary element. It describes something that is broken or not working, something that is defective.
To be good at something could be proficient. To be bad at something could, therefore, be deficient. Deficient is an antonym for proficient.
The opposite of "being good at" something would be "being bad at" it.
The car's engine was deficient in many ways. i have two sentences.. 1.Our prisons are our most deficient social service. 2.Patients who were deficient in vitamin C. The definition of deficient: not containing or having enough of something. [just in case you need it]
The direct preposition of deficient (lacking) is "in."e.g. He was deficient in mathematical ability. (There was a deficiency.)It might also use "to" or "with" if the deficiency is being modified.e.g. The work was deficient to some degree. (e.g. in some way)e.g. The car is deficient with respect to its braking.NOTE : one cannot be deficient "at" something