1.catchy / adjective /ˈkætʃ.i/
(especially of a tune or song) pleasing and easy to remember.
synonym: pleasant and easy to remember
tricky/deceptive/misleading
2.consciousness/ noun/ˈkɒn.ʃəs.nəs/ 
the state of understanding and realizing something.
e.g. Working in an unemployment office had helped to raise his political consciousness.
-conscious/ suffix
fashion-conscious
health-conscious
self-conscious
3.device/ noun /dɪˈvaɪs/
an object or machine that has been invented for a particular purpose.
e.g. Rescuers used a special device for finding people trapped in collapsed buildings.
4. familiar/ adjective /fəˈmɪl.i.ər/
easy to recognize because of being seen, met, heard, etc. before.
e.g. The house looked strangely familiar, though she knew she'd never been there before.
to know something or someone well.
e.g. I'm sorry, I'm not familiar with your poetry.
5. function/ noun /ˈfʌŋk.ʃən/
the natural purpose (of something) or the duty (of a person).
e.g. The function of the veins is to carry blood to the heart.
e.g. I'm not quite sure what my function is within the company.
6. ged rid of
to remove or throw away something unwanted.
e.g. I used weedkiller to get rid of the weeds in the garden.
to send away someone annoying or to persuade them to leave.
e.g. We got rid of our unwelcome guests by saying we had to go to bed.
7. hum/ verb /hʌm/
to make a continuous low sound.
e.g. The computers were humming in the background.
to sing without opening your mouth.
e.g. She hummed to herself as she walked to school.
8. infect/ verb /ɪnˈfekt/
to pass a disease to a person, animal or plant.
e.g. All the tomato plants are infected with a virus.
e.g. The ward was full of children infected with TB.
9. invade/ verb /ɪnˈveɪd/
to enter a country by force with large numbers of soldiers in order to take possession of it.
e.g. Concentrations of troops near the border look set to invade within the next few days.
to enter a place in large numbers, usually when unwanted and in order to take possession or do damage.
e.g. Hundreds of squatters have invaded waste land in the hope that they will be allowed to stay.
10. itch/ verb /ɪtʃ/
to have or cause an uncomfortable feeling on the skin which makes you want to rub it with your nails.
e.g. I can't wear wool - it makes me itch.
11. phenomenon /noun /fəˈnɒm.ɪ.nən/
something that exists and can be seen, felt, tasted, etc., especially something unusual or interesting.
e.g. There's evidence to suggest that child abuse is not just a recent phenomenon.
12. subjected/ verb /səbˈdʒekt/
to defeat people or a country and then control them against their wishes and limit their freedom.
e.g. The invaders quickly subjected the local tribes.
13. susceptible/ adjective /səˈsep.tɪ.bl̩/
easily influenced or harmed by something.
e.g. Among particularly susceptible children, the disease can develop very fast.
e.g. These plants are particularly susceptible to frost.
14. tune/ noun /tuːn/
a series of musical notes, especially one which is pleasant and easy
e.g. He was humming a tune as he dried the dishes.
15. abdomen/ noun /ˈæb.də.mən/
the lower part of a person's or animal's body, which contains the stomach, bowels and other organs, or the end of an insect's body.
abdominal/ adjective/ æbˈdɒm.ɪ.nəl/
16. bereave/ verb /bɪˈriːv/
to have a close relation or friend who has died.
e.g. Everyone who has been bereaved has to find his or her own way of coping.
17. consecrate/verb/ˈkɒnt.sɪ.kreɪt/
to officially make something holy and able to be used for religious ceremonies.
e.g. The new cathedral was completed and consecrated in 1962.
consecrated/adjective/ˈkɑːnt.sɪ.kreɪ.t̬ɪd/
consecration/noun/ˌkɒnt.sɪˈkreɪ.ʃən/
18. evoke/ verb /ɪˈvəʊk/
to make someone remember something or feel an emotion.
e.g. That smell always evokes memories of my old school.
evocation /noun /ˌiː.vəʊˈkeɪ.ʃən/
19. groove/ noun /ɡruːv/
a long narrow hollow space cut into a surface.
e.g. The window slides along a deep metal groove to open and close.
20. jolt/ verb /dʒoʊlt/
to (cause something or someone to) move suddenly and violently.
e.g. The truck jolted along the rough track through the field.
21. obsolete/ adjective /ˌɒb.səlˈiːt/
not in use any more, having been replaced by something newer and better or more fashionable.
Gas lamps became obsolete when electric lighting was invented.
22. prowl/ verb /praʊl/
to move around quietly in a place trying not to be seen or heard, such as when hunting.
e.g. There have been reports of a masked man prowling in the neighbourhood.
23. scoop/ noun /skuːp/
the amount held by a scoop.
e.g. Just one scoop of mashed potato for me, please.
24. status/ noun /ˈsteɪ.təs/
an accepted or official position, especially in a social group.
e.g. The association works to promote the status of retired people as useful members of the community.
e.g. Applicants should have a degree or a qualification of equal status.
25. sue/ verb /suː/
to take legal action against a person or organization, especially by making a legal claim for money because of some harm that they have caused you.
e.g. He was so furious about the accusations in the letter that he threatened to sue.