growthiest

/ˈɡroʊθiɪst/
adjective
  1. Superlative form of growthy; most inclined to grow quickly or vigorously, especially of plants or hair.
    • The growthiest patch of ivy covered the entire wall in just one season.
    • She claimed her garden had the growthiest roses in the neighborhood.
    • Among all the seedlings, the one in the sunniest spot is the growthiest.
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