Immobility
Weakness
Weakness noun - The quality or state of lacking physical strength or vigor.
Immobility is an antonym for weakness.
Both words in one sentence
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Sharks have a similar weakness: if you manage to flip one upside down, it will enter a state of "tonic immobility" and become paralyzed.
Source: Achilles' Heel -
The Sectopod used to have one big weakness : its immobility combined with a moderate attack range that allowed you to ignore it while you wrecked its allies.
Source: Video Game / XCOM 2
Cite this Source
Weakness and Immobility. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/immobility/weakness
Immobility & Weakness. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/immobility/weakness>.
Weakness or Immobility. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/immobility/weakness.
Google Ngram Viewer shows how "immobility" and "weakness" have occurred on timeline