lifelongdedication
nounUK /ˌlaɪf.lɒŋ ˌded.ɪˈkeɪ.ʃən/
US /ˌlaɪf.lɔːŋ ˌded.əˈkeɪ.ʃən/
Giving all your time and love to something for your whole life.
Her lifelong dedication to teaching helped thousands of children learn to read.
OTHER MEANINGS
2. Sticking with a goal or cause from childhood to old age.
His lifelong dedication to science began when he was a curious boy.
3. Steady hard work on one thing over many years.
The garden shows her lifelong dedication to growing flowers.
4. Strong and lasting love for a person, job, or idea.
Their lifelong dedication to each other inspired everyone who knew them.