Be concerned (about) (4)
I believe the answer is:
care
(Other definitions for care that I've seen before include "Protective custody" , "Worry" , "Safekeeping" , "Serious attention and thought" , "Prudence" .)
I believe the answer is:
care
(Other definitions for care that I've seen before include "Protective custody" , "Worry" , "Safekeeping" , "Serious attention and thought" , "Prudence" .)