godan verb (-ku)
go through all sorts of hardships; endure great difficulties
Emphasizes persevering through severe or prolonged hardship until the end. Often used when someone has overcome many struggles.
彼は若い頃、苦労し抜いて今の地位を築いた。
He went through all sorts of hardships in his youth and built his current position.
戦争中
During the war, many people endured great difficulties.