hard (a)
/hɑːrd/

cứng

not easy to bend, cut, or break

polyester (n)
/ˌpɑliˈɛstər/

sợi tổng hợp

a strong material made of fibers

pearl (n)
/pərl/

ngọc trai

a small, hard, shiny, white ball that forms inside the shell of an oyster

metal (n)
/ˈmɛt̮l/

kim loại

a type of solid mineral substance that is usually hard and shiny

platinum (n)
/ˈplætnəm/

bạch kim

a silver-gray precious metal, used in making expensive jewelry and in industry

soft (a)
/sɔft/

mềm

hanging shape easily when pressed; not stiff or firm

aluminium (n)
/ˌæl.jəˈmɪn.i.əm/

nhôm

a light silver-coloured metal that is used for making things such as pans for cooking

solid (a)
/ˈsɑləd/

dạng rắn

hard or firm; not in the form of a liquid or gas

nylon (n)
/ˈnaɪlɑn/

ni lông

a very strong artificial material, used for making clothes, rope, brushes, etc

crystal (n)
/ˈkrɪstl/

pha lê

a clear mineral, such as quartz, used in making jewelry and decorative objects

plastic (n)
/ˈplæs.tɪk/

nhựa

an artificial substance that can be shaped when soft into many different forms and has many different uses

tin (n)
/tɪn/

thiếc

a soft silver-white metal that is often mixed with other metals

pure (a)
/pjʊr/

nguyên chất

not mixed with anything else; with nothing added

diamond (n)
/ˈdaɪəmənd/

kim cương

a clear precious stone of pure carbon, the hardest substance known

symbol (n)
/ˈsɪmbl/

ký hiệu

a sign, number, letter, etc. that has a fixed meaning, especially in science, mathematics, and music

cardboard (n)
/ˈkɑrdbɔrd/

bìa các tông

stiff material like very thick paper, often used for making boxes

fibre (n)
/ˈfaɪbɚr/

sợi, chất liệu sợi

a material is made from a mass of natural of artifacial thread

balloon (n)
/bəˈlun/

bong bóng

a small bag made of very thin rubber that becomes larger and rounder when you fill it with air

steel (n)
/stiːl/

thép

a strong metal made from a mixture of iron and carbon

liquid (n)
/ˈlɪkwəd/

chất lỏng

a substance that flows freely and is not a solid or a gas