One of my students showed her vocabulary (and grammar) notebook to her private tutor, who was surprised at the way new vocabulary was recorded in it. The student then conveyed the tutor's concerns to me, for example, that "pack in" doesn't have to go necessarily with the job (I'd taught the group "she's packed in her job"). She said, "it means 'finish' or 'give up'". I agreed. But where does it get you? If "pack in" can be substituted for "finish" or one of the other alleged synonyms (alleged because no two or more words are ever absolute synonyms - see HERE ), can we say "I've packed in my homework"? It is true that "pack in" collocates with other nouns/noun phrases, but "job" is one of the most frequent collocates. I've consulted two dictionaries - I often look up a word in different online dictionaries to glean its most typical use - and both Oxford Advanced Le...