
to assess; to reduce to a fixed sum
Found on 
http://phrontistery.info/a.html

• (v. t.) To assess or reduce, as an arbitrary penalty or amercement, to a certain and reasonable sum. • (v. t.) To confirm; to assure.
Found on 
http://thinkexist.com/dictionary/meaning/affeer/
 Af·feer'  transitive verb
Af·feer'  transitive verb [ Old French 
 aforer , 
 afeurer , to tax, appraise, assess, from Latin 
 ad + 
 forum market, court of justice, in Late Latin also meaning 
 price .] 
 1.  To confirm; to assure. [ Obsolete] 'The title is 
 affeered .' 
 Shak.   ...Found on 
http://www.encyclo.co.uk/webster/A/38

affeer 1. To confirm; to assure.  2. An old law, to assess or to reduce, as an arbitrary penalty or amercement, to a certain and reasonable sum.  From Old French aforer, afeurer, 'to tax, appraise, assess', from Latin ad- plus forum, 'market, court of justice'; in Late Latin also meaning 'price'.
Found on 
http://www.wordinfo.info/words/index/info/view_unit/2844/
  No exact match found.