Ankylosis
/ˌæŋkɪˈləʊsɪs/
Definition 1 of 2
Pro Tip 1/3Rigidity Context
Use 'ankylosis' to describe extreme stiffness in joints, implying lack of movement. 
Her suffering from ankylosis made simple tasks challenging.
Pro Tip 2/3Technical Term
'Ankylosis' is highly technical; use it in medical or healthcare settings. 
The doctor explained the ankylosis, recommending surgery as a treatment.
Pro Tip 3/3Chronic Conditions
Often relates to chronic illnesses like arthritis, highlighting severity. 
Living with ankylosis requires adapting to new physical limitations.