It depends. If you openly didn’t like them just start being nicer slowly, but if you didn’t like them and didn’t share , then just start talking to them little by little but at a faster pace.
As a dictionary can show you, the word 'sinewy' is an adjective with the meaning of "consisting of or resembling sinews; with strong muscles and little fat". One synonymous for 'sinewy' is 'athletic'.
