7、verydifferenttowhatweacceptandrecognizeasEnglishtoday.③.Everydaywordslikegoogle, unfriend and app simplydidn'texistin1990.④.Evenmorewordshavehadunexpectedshiftsinmeaninginthosetwodecades.IfyouhadmentionedtweetingtoanEnglish-speakerafewyearsago,hewouldhaveassumedyouweretalkingaboutbir