noun, noun which may take the genitive case particle 'no'
custom order; made-to-order item
Refers to something ordered specially, often clothing or accessories, made to one's specifications. Also used in the phrase お誂え向き (o-atsurae-muki) meaning 'just right' or 'perfect for'.
このスーツは誂えです。
This suit is custom-made.
誂えの靴は足にぴったり合う。
Custom-ordered shoes fit your feet perfectly.
注文 is a general term for ordering goods or services, while 誂え specifically implies a custom, made-to-order item, often with a nuance of luxury or personal tailoring.
オーダーメイド is a loanword meaning 'made to order', similar to 誂え, but 誂え has a more traditional, Japanese feel and is often used for clothing or accessories.
Derived from the verb 誂える (あつらえる), meaning 'to order' or 'to have something made'. The noun form 誂え refers to the ordered item itself.