anocheceríais

conditional form-of plural second-person

anochecerの二人称複数条件法

English Meaning

second-person plural conditional of anochecer

Si os quedaseis en el campo sin prisa, anocheceríais mientras el cielo se teñía de púrpura.

もし田舎にゆっくり留まれば、空が紫に染まる中で夜が訪れるでしょう。

If you were to stay in the countryside unhurriedly, you would experience nightfall as the sky turned purple.