strengthening

Noun
  1. Becoming stronger (synset 107441824)
    is a type of: shift, transformation, transmutation - a qualitative change
  2. The act of increasing the strength of something (synset 100374871)
    is a type of: increase, step-up - the act of increasing something
    subtypes: concentration - strengthening the concentration (as of a solute in a mixture) by removing diluting material

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