childhood (n)
/ˈtʃaɪld.hʊd/

the time of your life when you are a child

adolescence (n)
/ˌæd.əˈles.əns/

the period of your life when you change from being a child to being a young adult

birth (n)
/bɜrθ/

the occasion when a baby comes out of its mother's body

puberty (n)
/ˈpju·bər·t̬i/

the stage of development when a child changes physically into an adult

old age (a)
/oʊld eɪdʒ/

a late time of life

retirement (n)
/rɪˈtaɪə.mənt/

the act of leaving your job and stopping working, usually because you are old

marriage (n)
/ˈmer.ɪdʒ/

a legally accepted relationship between two people in which they live together

wartime (n)
/ˈwɔːr.taɪm/ 

the period when a war is taking place

grow up (phrasal verb)
/ɡroʊ ʌp/

to change from being a baby or young child to being an older child or adult

have (v)
/hæv/

to possess; own; hold for use

spend (v)
/spend/ 

to pay out or expend; dispose of (money, wealth, resources, etc.)

leave (v)
/liːv/

to go away from a person or place

get (v)
/get/

to obtain something

move (v)
/mu:v/

to change position

lose (v)
/luːz/

to have less of something, esp. in the body

bring up (phrasal verb)
/brɪŋ ʌp/

to look after a child until he or she becomes an adult

wise (a)
/wɑɪz/

having or showing good judgment

difficult (a)
/ˈdɪf·ɪ·kʌlt/

not easy

wrong (a)
/rɒŋ/

not suitable or correct, or not as it should be

tend (v)
/tend/

to be likely to behave in a particular way or have a particular characteristic