old A1

/old/ skilled through long experience

adult A2

/əˈdʌlt/ (of animals) fully developed

element B1

/ˈɛləmənt/ the most favorable environment for a plant or animal

altitude B2

/ˈælt.ɪˌtjuːd/ elevation especially above sea level or above the earth's surface

adolescent C1

/ˌæd.əˈlɛs.ənt/ in the state of development between puberty and maturity

abolish B2

/əˈbɑl.ɪʃ/ to do away with

exalt B2

/ɪɡˈzɔlt/ raise in rank, character, or status