词根词缀：dat-, dos-, dot-, dow-, don-, dit-

【来源及含义】Greek + Latin: dare, to give, a giving, given; a gift; to grant, to offer

【相关词根词缀】 Another term used for medical dosage can be seen at this posology page.

【同源单词】a datu, a die datus, air dose, anecdote, antidotal therapy, antidote

词根词缀：extra-, extro-, extr-, exter-

【来源及含义】Latin: beyond, outside, on the outside, outward, external

【同源单词】Ab extra, ad extra, ad extremum, exteriorly, external, external reforming

词根词缀：-tion

【来源及含义】Latin: a suffix forming nouns from verbs of condition and action; an act or process: resumption, absorption; state or condition, redemption, exhaustion; something resulting from or otherwise related to an act or process, assumption, friction

【相关描述】This unit is presenting a small fraction of the hundreds of words ending with the suffix of -tion; however, there is a significant number of words which may help everyone have a better understanding and appreciation of the use of this element.

【同源单词】abduction, abjection, ablution, ablution, abolition, abruption