Unassuming; limited (6)
I believe the answer is:
modest
I believe this is a double definition.
'unassuming' is the first definition.
(similar in meaning)
'limited' is the second definition.
(similar in meaning)
(Other definitions for modest that I've seen before include "Demure" , "Reserved" , "Prudent" , "Having a humble opinion of oneself" , "Not vain or showy" .)