Fetching details from the dictionary...

trouble; hardship; difficulty; labour; labor; toil; pains
anxiety; worry; concern; cares
彼女は苦労してここまでたどり着いた。
She went through hardships to get here.
親の苦労を知って感謝の気持ちが深まった。
Understanding my parents' hardships deepened my gratitude.
若い頃の苦労は将来の糧になると思う。
I think hardships in youth become nourishment for the future.