down‧side /ˈdaʊnsaɪd/ noun
the downside the negative part or disadvantage of something Antonym : upside:
Digital cell phones offer more security, but the downside is that they have less power.
the downside of
The downside of the book is that it is written in a rather boring style.

[TahlilGaran] Dictionary of Contemporary English ▲

disadvantage noun [countable] a bad feature that something has, which makes it less good or less useful than other things:
What do you think are the disadvantages of nuclear energy?
This car uses a lot of fuel, which is a major disadvantage.
drawback noun [countable] a bad feature that something has, although it has advantages that are usually more important:
One of the main drawbacks is the price.
bad point noun [countable] especially spoken a bad feature that something has:
All of these designs have both their good points and bad points.
the downside noun [singular] the disadvantage of a situation that in most other ways seems good or enjoyable:
It’s a great job. The only downside is that I don’t get much free time.

[TahlilGaran] English Thesaurus ▲