Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Verb
S: (v) strengthen, beef up, fortify (make strong or stronger) "This exercise will strengthen your upper body"; "strengthen the relations between the two countries"
S: (v) strengthen (gain strength) "His body strengthened"
S: (v) tone, tone up, strengthen (give a healthy elasticity to) "Let's tone our muscles"