horizon (n)
/həˈraɪzn/

the line at the farthest place that you can see, where the sky seems to touch the land or sea

sunlounger (n)
/sʌnˈlaʊndʒər/

a chair with a long seat that supports your legs, used for sitting or lying on in the sun

snorkel (n)
/ˈsnɔrkl/

a tube that you can breathe air through when you are swimming under the surface of the water

swimming costume (n)
/swɪmɪŋ ˈkɑstum/

a piece of clothing that women wear for swimming

wetsuit (n)
/ˈwɛtsut/

a piece of clothing made of rubber that fits the whole body closely, worn by people playing water sports or diving

deserted (a)
/dɪˈzərt̮əd/

with no people in it

naturist (n)
/ˈneɪtʃərɪst/

a person who likes to be naked

rocky (a)
/ˈrɑki/

full of rocks

crystal clear (a)
/ˈkrɪstl klɪr/

completely clear and bright

pebble (n)
/ˈpɛbl/ 

a smooth, round stone that is found in or near water

sunburn (n)
/ˈsʌnbərn/

the condition of having painful red skin after spending too much time in the sun

shade (n)
/ʃeɪd/

an area that is dark and cool under or behind something

sunbathe (v)
/ˈsʌnbeɪð/

to sit or lie in the sun, especially in order to turn brown

exposure (n)
/ɪkˈspoʊʒər/

a medical condition caused by being out in very cold weather for too long without protection

sunblock (n)
/ˈsʌnblɑk/

a cream that you put on your skin to protect it completely from the harmful effects of the sun

expert (n)
/ˈek.spɝːt/

a person with special knowledge, skill, or training in something

out of (prep)
/aʊt ɑːv/

no longer having

keep (v)
/kip/

to stay in a particular condition or position

tide (n)
/taɪd/

the rise and fall of the sea that happens twice every day

bikini (n)
/bɪˈkini/

a piece of clothing in two pieces that women wear for swimming and lying in the sun