de- a prefix occurring in loanwords from Latin (decide); also used to indicate privation, removal, and separation (dehumidify), negation (demerit; derange), descent (degrade; deduce), reversal (detract), intensity (decompound). Compare di-2, dis-1.

half
b : half in quantity or value : half of or occurring halfway through a specified period of time semiannual semimonthly — compare bi- 2 : to some extent : partly : incompletely semicivilized semi-independent semidry — compare demi-, hemi- 3a : partial : incomplete semiconsciousness semidarkness.

prefix. Definition of de- (Entry 2 of 2) 1a : do the opposite of deactivate. b : reverse of de-emphasis. 2a : remove (a specified thing) from delouse.

The English prefix de-, which means “off” or “from,” appears in hundreds of English vocabulary words, such as dejected, deduce, and deficient. You can remember that the prefix de- means “from” or “off” via the word descend, or to climb down “from” or “off” a height, such as a mountain.

interdepartmental

• interdepartmental.
• nondenominational.
• microdermabrasion.
• depersonalization.
• transcendentalism.
• denominationalism.
• dedifferentiation.
• dimethylsulfoxide.

Bimonthly vs. Semimonthly Bi- is a prefix meaning two or twice; semi- is a prefix meaning half. There is debate surrounding the actual definition of bi- being both two and twice, although semi- is always half.

Germany (Deutschland; Internet top level domain) DE. Delaware (US postal abbreviation) DE. Desktop Environment.

De is defined as meaning “of” in Spanish, French and Portuguese. An example of de is of the water. Do or make the opposite of; reverse.

Key Takeaways

1. De is one of the most common Spanish prepositions.
2. One of the most frequent uses of de is to indicate possession, which English uses indicates by using an apostrophe followed by “s.”
3. De is also often used to translate English attributive nouns, as nouns in Spanish are very seldom used that way.

A prefix that means “half,” (as in semicircle, half a circle) or “partly, somewhat, less than fully,” (as in semiconscious, partly conscious).

A prefix that means “half,” as in semicircle, half a circle. A prefix that means “partly,” “somewhat,” or “less than fully,” as in semiconscious, partly conscious. The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company.

(word root) half, partially Examples of words with the root semi-: semicircle, semiautomatic a combining form meaning “half” (semiannual), “partially,” “somewhat” (semiautomatic; semidetached; semiformal).

Definition of semi- (Entry 4 of 4) 1a : precisely half of: (1) : forming a bisection of semidiameter. (2) : being a usually vertically bisected form of (a specified architectural feature) semidome.

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