دانش و درک - بی تخصص

used to describe a person who seems to be incapable of doing something due to a lack of necessary resources or skills

آدمِ انجام کاری نبودن, فرد ناتوان، فرد بی‌کفایت

used to say that someone is extremely bad at doing something

افتضاح در کاری

a person or thing that excels at doing only one thing

فردی که تنها در یک زمینه خوب است, فردی که تنها یک ویژگی خاص یا استعداد یا دارد

used to say that one did not have much experience with something and therefore is not very good at it

از میادین به دور, دور از گود

having little knowledge or experience of a particular situation or activity

بی‌تجربه

to no longer be able to do a certain activity as well as one did in the past

اُفت کردن

to lack knowledge or understanding of a particular concept or term

هیچ چیزی درباره چیزی ندانستن

an unscientific or inaccurate estimate or method

روش غیرعلمی, روش آزمایشی