______ofmeaningisaprocessbywhichawordthatoriginallyhadaspecializedmeaninghasnowbecomegeneralized.

You should help them ________ when your friends quarrel with each other.

CollinsCOBUILDEnglishLanguageDictionary(1987)hassomeuniquefeaturessuchasdefinition,extracolumnand______.

OxfordAdvancedLearnersDictionary’,3rdEdition(1980),isamongthebest-knownBritish______dictionaries.

From the viewpoint of word formation, the word “ smog” is a ______.