Two, actually.
I refer to the modifier “sort of.” Here’s an example from a science type who wants to be chatty and informal:
Muons are sort of like extra-heavy electrons.
https://www.quantamagazine.org/did-supernovas-kill-off-the-monster-shark-megalodon-20190115
I clearly remember Mrs. Clemens telling us in sixth grade that “sort of” was poor English—we should use “rather,” which would change that sentence to
Muons are rather like extra-heavy electrons.
Sounds a little bit stiff and formal. But even that “rather” is unnecessary! Try this on for size:
Muons are like extra-heavy electrons.
Says the same thing as the other sentences, doesn’t it? And it’s simpler, more direct, and has more punch.
Remember the rule about conciseness:
If you can leave out a word without changing the meaning, leave it out.