English Vocabulary in Use - 64 Weight and density

weighty

weighty

abstract or physical things; usually includes the idea of ‘seriousness’

weighty (tome)

large book

unwieldy

abstract or physical things; usually includes the idea of ‘difficult to handle’

cumbersome

often used for machines and equipment that are difficult to handle; also used for systems, structures, etc.

burdensome

usually used of abstract things

ponderous

slow and clumsy because of weight, but usually used for dull and excessively serious abstract things

lumbering

usually used of physical things; often suggesting ‘heavy movement’

weighed down

carrying very heavy things

weigh up

consider and compare

weighed out

weighed a quantity of loose goods

weighing on me

troubling my mind

weighed in

added more points to the argument

thicken

make thicker

sift

shake it in a sieve to separate the grains

lumpy

have solid pieces in it

congealed

become thick and solid

solidified

become solid

thin

make thinner

thin out

become less dense

thinned .. out

made it less thick

dilute it / water it down

add water

impenetrable

impossible to move through

impervious (to)

liquid cannot pass through