adynamic

1. Characterized by an absence of force or forcefulness (synset 300814050)
   similar to:

   • backward - having made less than normal progress
   • moribund, stagnant - not growing or changing; without force or vitality
   same as: undynamic
2. Lacking energy or vitality (synset 302332671)
   similar to: weak - wanting in physical strength
   same as: asthenic, debilitated, enervated

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