stringent
Concise Oxford English Dictionary © 2008 Oxford University Press:
stringent /ˈstrɪn(d)ʒ(ə)nt/
▶adjective (of regulations or requirements) strict, precise, and exacting.
– derivatives
stringency noun,
stringently adverb.
stringency noun,
stringently adverb.
– origin C17: from L. stringent-, stringere ‘draw tight’.
'stringent' also found in these Oxford entries:

