fifty-five
UK: ˈfɪfti faɪv | US: ˈfɪfti faɪv
adj. / n. the number equivalent to the sum of fifty and five; 55
The word "fifty-five" is a compound numeral formed by combining "fifty" (from Old English fīftig, derived from fīf "five" + -tig "group of ten") and "five" (from Old English fīf, Proto-Germanic fimf). The structure reflects the additive nature of English numerals, where tens and units are joined by a hyphen. This logical construction mirrors the arithmetic value (50 + 5) and has remained consistent since Middle English.
She scored fifty-five points in the game.
The temperature reached fifty-five degrees today.
There are fifty-five chapters in this book.
He waited fifty-five minutes for the bus.
The vintage car was built in nineteen fifty-five (1955).