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Noun: strengthening  streng-thu-ning
  1. Becoming stronger
  2. The act of increasing the strength of something
Verb: strengthen  strengk-thun
  1. Make strong or stronger
    "strengthen the relations between the two countries"; "This exercise will strengthen your upper body";
    - beef up, fortify
  2. Gain strength
    "His body strengthened";
    - toughen
  3. Give a healthy elasticity to
    "Let's strengthen our muscles";
    - tone, tone up

Derived forms: strengthenings

Type of: alter, change, exercise, increase, modify, shift, step-up, transformation, transmutation, work out

Antonym: weaken, weakening

Encyclopedia: Strengthening