見み失うしなう

godan verb (-u), transitive verb

lose sight of; miss

Used when you can no longer see something you were tracking, or figuratively when you lose track of a goal or opportunity.

• 人ひと混ごみの中なかで友とも達だちを見み失うしなった。

  I lost sight of my friend in the crowd.

• 目もく標ひょうを見み失うしなわないように頑