Adolescence /ˌæd

toxic /ˈtɒk.sɪk/ /ˈtɑːk-/ adjective POISONOUS
1. poisonous
toxic waste/chemicals/effluent
toxic /ˈtɒk.sɪk/ /ˈtɑːk-/ adjective UNPLEASANT
2. informal very unpleasant or unacceptable
3. informal causing you a lot of harm and unhappiness over a long period of time
toxic parents
a toxic friendship
uninhabitable /ˌʌn.ɪnˈhæb.ɪ.tə.bl ̩/ /-t ̬ə-/ adjective
not habitable (= suitable to live in)
If there's no roof then the house is uninhabitable.
universal /ˌjuː.nɪˈvɜː.s ə l/ /-ˈvɝː-/ adjective
existing everywhere or involving everyone
a universal truth
Food, like sex, is a subject of almost universal interest.
The new reforms have not met with universal approval within the government.
unmanned /ʌnˈmænd/ adjective
describes a spacecraft, or a place where military guards work, that has no people present to operate or be in charge of it
an unmanned mission to the planet Mars