Учебное пособие в систематизированном виде содержит необходимые для изучения курса лексикологии английского языка вспомогательные материалы: планы семинаров, определения основных понятий и терминов на английском и русском языках, темы курсовых

Bound morpheme is a morpheme which does not coincide with a sepa­rate word- form. Bound morphemes include: 1. all affixes, e.g. the prefix anti­in the word antiterrorist; the suffix -ee in the word refugee; 2. the inflections, e.g. -ing in the word going; 3. some root-morphemes, e.g. docu- in the word document; horr- in horrible; busi- in the words business, etc.
Semi-bound/semi-free morpheme (or semi-affix) is a morpheme which stands midway between a root and an affix. A semi-bound morpheme can func­tion as an independent full-meaning word and at the same time as an affix (a prefix or a suffix). Compare: to speak ill of somebody - ill-fed, ill-dressed, ill-bred; to be proof against water - waterproof, kiss-proof, foolproof.
Examples of semi-prefixes: half- (half-eaten, half-broken); mini- (mini-skirt, mini-budget); midi- (midi-coat, midi-bus); maxi- (maxi-skirt, maxi-problem); self­self-starter, self-help); back- (backmatter, backset); by- (by-play, by-time), etc.
Examples of semi-suffixes: -man (gentleman, postman); -like (ladylike, godlike); -proof (fire-proof, holeproof); -worthy (noteworthy, praiseworthy); -way (anyway), -way(s) (sideways); -monger (gossipmonger, fashionmonger); -wright (playwright, shipwright); -friendly (eater-friendly, environment-friendly); -gap (communicationgap, generationgap); -happy (bombhappy, triggerhappy); -intensive (profit-intensive, technology-intensive); -land (Ireland, Scotland, wonderland); -oriented (job-oriented, money-oriented); -safe (failsafe); -ware (glassware, humanware); -wide (personnelwide), etc.
Stem is the part of a word which remains when a derivational or a func­tional affix is stripped from the word. It expresses the lexical and the part-of- speech meanings. It is the part of a word that remains unchanged throughout its paradigm. For example, in the word employer, formed with the help of the suf­fix -er, the stem is employ-; the stem of the paradigm hearty - heartier - (the) heartiest is hearty-.
Word-family is a set of words that all share a common root, like heart, hearty, heartless, heartlet, hearten, dishearten, heartbreak, etc.