strengthen

1. Make strong or stronger (synset 200221295)
   "This exercise will strengthen your upper body"; "strengthen the relations between the two countries"
   causes: strengthen - gain strength
   is a type of: alter, change, modify - cause to change; make different; cause a transformation
   subtypes:

   • vitalise, vitalize - make more lively or vigorous
   • ruggedise, ruggedize - produce in a version designed to withstand rough usage
   • substantiate - solidify, firm, or strengthen
   • restrengthen - make strong again
   • brace up, undergird - make secure underneath
   • confirm - make more firm
   • reenforce, reinforce - make stronger
   • buttress - make stronger or defensible
   • brace, stabilise, stabilize, steady - support or hold steady and make steadfast, with or as if with a brace
   • batten - secure with battens
   • batten, batten down, secure - furnish with battens
   same as: beef up, fortify
2. Gain strength (synset 200220887)
   "His body strengthened"
   is a type of: change - undergo a change; become different in essence; losing one's or its original nature
   subtypes:

   • consolidate - make firm or secure; strengthen
   • proof - make resistant (to harm)
   • back - strengthen by providing with a back or backing
   • sandbag - protect or strengthen with sandbags; stop up
   • toughen - make tough or tougher
3. Give a healthy elasticity to (synset 200101031)
   "Let's tone our muscles"
   is a type of: exercise, work out - do physical exercise
   same as: tone, tone up

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