longtimechallenge

noun
UK /ˈlɒŋ.taɪm ˈtʃæl.ɪndʒ/
US /ˈlɔːŋ.taɪm ˈtʃæl.ɪndʒ/

A hard thing that takes a very long time to finish.

Learning to play the piano was a longtimechallenge for Maya, but she kept practicing every day.


OTHER MEANINGS

2. A problem that a whole community works on for many years.

Cleaning up the river became a longtimechallenge for the whole town.

3. A personal goal that needs steady effort over months or years.

Running a marathon was his longtimechallenge, and he trained for two years.

4. A difficult task that tests someone's patience for a long while.

Fixing the old clock was a longtimechallenge for the repairman.