In the list below, the words printed in bold are words which are very common and
important to learn. The other words in the same row are words in the same family,
often formed with prefixes and suffixes. Sometimes they are just a different part of
speech (e.g. anger, which is a noun and a verb). All the words in this list have entries
in the dictionary except for some beginning with un-, im-, in- or ir-, or ending with
-ly or -ily, where the meaning is always regular. Sometimes words in a word family
can have meanings which are quite different from others in the group, so you should
always check in the dictionary if you are not sure of the meaning.