54.1. Archaisms are words and phrases that have fallen out of general use but are used for special effect, normally in literature. These vary in effect from the gently old-fashioned or jocular
Archaisms are most frequently encountered in poetry, law, science, technology, geography and ritual writing and speech. Their deliberate use can be subdivided into literary archaisms, which seeks to evoke the style of older speech and writing . and lexical archaisms, the use of words no longer in common use.
Examples (ЧТО БЫ ВАМ БЫЛО ПОНЯТНО, ЕСЛИ ЕГО УСТНО БУДЕМ ПЕРЕССКАЗЫВАТЬ.)
A type of archaism is using an older version of you: thou. Thou is the nominative form . the oblique/objective form is thee (functioning as both accusative and dative), and the possessive is thy orthine.
Though thou hast ever so many counsellors, yet [yet is generally not an archaism, but it is in this context] do not forsake the counsel of thy own soul. English proverb
Today me, tomorrow thee.English proverb
The meaning of this proverb is that something that happens to a person, is likely to happen later to another who observes it, especially if the two people are similar.
To thine own self be true.William Shakespeare
The meaning of this saying is simply that it is unwise to lie to yourself.
54.2. A neologism (pron.: /niːˈɒlədʒɪzəm/ . from Greek νέο- (néo-), meaning new, and λόγος (lógos), meaning speech, utterance) is a newly coined term, word, or phrase, that may be in the process of entering common use, but has not yet been accepted into mainstream language. Neologisms are often directly attributable to a specific person, publication, period, or event. Νεολεξία(Greek: a new word, or the act of creating a new word) is a synonym for it. The term neologism is first attested in English in 1772, borrowed from French néologisme (1734)
Four classification of words in point of time
new words
current words
archaic words
absolete words