先月last month先週last week先生teacher先輩senior先日the other day先々月month before last先々週week before last先祖ancestor先端pointed end先頭head祖先ancestor先行preceding先先月month before last先先月month before last先先週week before last先先週week before last先代family predecessor先だってrecently先着first arrival先天的a priori優先preference
代 だい
時代era近代present day現代nowadays代金price代表representative代理representation年代age代名詞pronoun古代ancient times世代generation先代family predecessor代弁pay by proxy代用substitution