| marginal /ˈmɑːdʒɪnl/ | very small; not important | The new rules made only a marginal difference to waiting times. |
| negligible /ˈneɡlɪdʒəbl/ | so small it can be ignored | The extra cost is negligible — less than a euro. |
| considerable /kənˈsɪdərəbl/ | large in size or importance | The repairs will cost a considerable amount. |
| marked /mɑːkt/ | very noticeable | There has been a marked improvement in her writing since September. |
| unprecedented /ʌnˈpresɪdentɪd/ | never having happened before | The heatwave reached unprecedented temperatures for April. |
| ambiguous /æmˈbɪɡjuəs/ | having more than one possible meaning | The ending of the film is deliberately ambiguous. |
| explicit /ɪkˈsplɪsɪt/ | stated clearly and directly | The instructions were explicit: no phones in the exam room. |
| implicit /ɪmˈplɪsɪt/ | suggested but not said directly | There was an implicit criticism in her polite smile. |
| tentative /ˈtentətɪv/ | not certain or final | We have made tentative plans to meet in June. |
| exhaustive /ɪɡˈzɔːstɪv/ | including every possible detail | The report gives an exhaustive list of the risks. |