'motion-restricting' is a compound of the noun 'motion' and the present-participle adjective 'restricting'. 'motion' originates from Latin, specifically the word 'motio' (from the verb 'movere'), where 'movere' meant 'to move'. 'restricting' comes from the verb 'restrict', which originates from Latin 'restringere', where 're-' meant 'back' and 'stringere' meant 'to bind or draw tight'.

'motion' passed into English via Old French 'motion' and Medieval Latin 'motio' from Latin 'motio/movere' and became the modern English 'motion'. 'restrict' developed from Latin 'restringere' into Late Latin/Old French forms and then into English as 'restrict' (with the -ing participle forming 'restricting'), giving the compound 'motion-restricting'.

Initially, 'motion' meant 'the act or process of moving' and 'restringere' carried the idea 'to bind back' or 'draw tight'; over time 'restrict' came to mean 'to limit' or 'confine'. The compound therefore evolved to mean 'that which limits or confines movement.'