Adolescence /ˌæd

natural /ˈnætʃ. ə r. ə l/ /-ɚ-/ adjective EXPECTED
5. normal or expected
Of course you're upset - it's only natural.
It 's natural that you should feel anxious when you first leave home.
It 's quite natural to experience a few doubts just before you get married.
natural /ˈnætʃ. ə r. ə l/ /-ɚ-/ adjective MUSIC
6. [ after noun ] (of a musical note) not sharp or flat
E natural
resistant /rɪˈzɪs.t ə nt/ adjective NOT ACCEPTING
1. not wanting to accept something, especially changes or new ideas
Why are you so resistant to change?
resistant /rɪˈzɪs.t ə nt/ adjective NOT AFFECTED
2. not harmed or affected by something
a stain-resistant carpet
a disease-resistant variety of tomato
semi-arid /ˌsem.iˈær.ɪd/ /-ˈer-/ adjective specialized
describes an area or climate with little rain but not completely dry
Compare arid
tropical /ˈtrɒp.ɪ.k ə l/ /ˈtrɑː.pɪ-/ adjective
1. from or relating to the area between the two tropics
tropical fish
a tropical island/region/climate
Leprosy is one of the few tropical diseases which could be eradicated early in the 21st century.
She specialises in tropical medicine (= the treatment of diseases from the tropical areas of the world) .
The Amazon river basin contains the world's largest tropical rainforest .
The hurricane was downgraded to a tropical storm when its speed dropped to 70mph.
See also subtropical
2. informal extremely hot and feeling wet
The weather was positively tropical last summer.
vulnerable /ˈvʌl.n ə r.ə.bl ̩/ , /ˈvʌn.rə-/ /ˈvʌl.nɚ.ə-/ adjective
able to be easily physically, emotionally, or mentally hurt, influenced or attacked
I felt very vulnerable, standing there without any clothes on.
It is on economic policy that the government is most vulnerable.
Tourists are more vulnerable to attack, because they do not know which areas of the city to avoid.