- 衰弱 adjectiveweakfeeble or weak; lacking strength or vitality
- 性 affix[-ity]Suffix used after verbs or adjectives to form nouns expressing a state, quality, or scope, similar to English "-ity", "-ness", or "-ism".
- neurosisA collective term for psychological disorders caused by mental factors that lead to temporary dysfunction, often involving anxiety, phobias, or obsessive-compulsive behaviors.