adjective
mere
MEER/mɪr/
Only what is specified, with no greater importance.
The imposing castle is a mere cardboard model with an unfinished back.

Etymology
‘Unmixed, pure’ connects to something being simply what it is, with nothing added. English developed both ‘nothing less than’ and ‘nothing more than’; the selected sense uses the latter, limiting force.
In context
there's a lot more to digging you see than mere brute strength and grunting
More examples
- He dismisses the warning as a mere rumor.
- A mere apology does not fix the damage.
- She is a mere beginner, but she learns quickly.
Forms
merely adverb — Only as stated; nothing more.