archaic

形容词 archaic:

1. so extremely old as seeming to belong to an earlier period
   同义词：antediluvian, antiquated
2. little evolved from or characteristic of an earlier ancestral type
   同义词：primitive

1. An archaic word, phrase, idiom, or other expression.
   古词，古语古词、古短语、古习语或其它表达(形式)

ar.cha.ic

adj.Abbr. arch.（形容词）缩写 arch.
Of, relating to, or characteristic of a much earlier, often more primitive period:
创始期的：一种很早的，常为更原始时期的，或与之有关的，或有其特征的：
例句：
an archaic bronze statuette.
一种相当古老的青铜小雕像

No longer current or applicable; antiquated:
过时的，陈旧的：不再流行或使用的；过时的：
例句：
archaic laws.See Synonyms at old
已不使用的法律参见 old

Of, relating to, or characteristic of words and language that were once common but are now used chiefly to suggest an earlier style or period.
古体的，已不通用的：曾经通用而现在不再使用主要指早期风格或时代的单词或语言的，与之有关的或具有其特征的

来源：
Greek arkhaikos [old-fashioned]
希腊语 arkhaikos [过时]
from arkhaios [ancient]
源自 arkhaios [古代的]
from arkhô [beginning]
源自 arkhô [开始]
from arkhein [to begin]
源自 arkhein [开始]

【引伸】
archa.ically
adv.（副词）