Synonyms for heavy

adjective

typical contexts

example

weighty

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

a weighty tome [large book], discuss weighty issues

unwieldy

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

an unwieldy system/bureaucracy, an unwieldy object, e.g., a big box

cumbersome

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

a cumbersome weapon, a cumbersome process

burdensome

usually used of abstract things

a burdensome duty

ponderous

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

a ponderous style, e.g., way of writing or speaking, a ponderous thesis

lumbering

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

a lumbering truck, a lumbering bear