要

Business

consumer (of a product, service, etc.); customer; end user

Ecology

consumer (in a food chain)

principal movement (of an earthquake); principal shock

as necessary; if necessary; as the need arises; as occasion demands; where appropriate

variables; uncertain elements; uncertainties; imponderables

(all) important positions; every strategic point; each key post

(all) important parts; every important point

if necessary

material witness; suspect

Finance

necessary expenses; due charges; tax deductible expenses

Noun or verb acting prenominally

urgent; requiring quick (response)

person requiring special attention; person to be wary of; person under (police) surveillance; dangerous person

quickly and skillfully; to the point; succinctly; concisely

time required; time taken; necessary time

absolutely necessary

necessary items; required items; necessary information; required fields (on a form); mandatory fields

major city

supply and demand

component; element; part

important matter; matters of weight

not required

necessary condition; requirement

key people

important documents; important papers

important cultural property; important cultural asset

Adjective - yoi/ii class

knowing how to swim with the tide; being good at dealing with things