respond
The problem has become more serious because of the non-response from governments around the world.
Given the high number of non-responses, it is hard to draw any conclusions from the data.
Nonresponse was reduced when the questionnaire was put online.
The nonresponse rate for the survey was less than 3%.

SMART Vocabulary: related words and phrases

Answering & responding
acknowledgment
affirmatively
answer
answer the door
clap back
clapback
comeback
counter
counterattack
field
I take/plead the Fifth (Amendment)idiom
in the affirmative
keep (someone/something) away
non-respondent
non-responder
non-responsive
rejoin
respondent
response
thank you

You can also find related words, phrases, and synonyms in the topics:

Reacting and responding