This is the 1615th most frequent Russian word.
фон
Background.
'Фон' is used to indicate a background or setting against which something is seen or situated.
На фоне заката город выглядит особенно красиво.
Against the background of the sunset, the city looks especially beautiful.
'Фон' describes the ambiance or secondary role of something happening in relation to a primary event.
Музыка играла тихо на фоне общего разговора.
Music played softly in the background of the general conversation.
'Фон' metaphorically represents the circumstances or conditions that influenced the emergence of something.