inquiry; enquiry; investigation; (police) interview; questioning (e.g. witness, suspect); hearing
pretext for not revealing something (e.g. actual reason for one's failure, vested interest, etc.)
having good knowledge of a certain matter; person who has good knowledge of a certain matter; informed source
economic condition; economic circumstances; financial situation
internal (domestic) affairs
traffic conditions (e.g. heavy traffic); transportation situation (e.g. bad roads)
social conditions; social circumstances
given the circumstances; such being the case
circumstances of the office
clausula rebus sic stantibus (legal principle that agreements become non-binding if there is a major, unforeseeable change of circumstances)