Prefixes

They are short words that are placed before a word, thus changing the meaning of that word.

The most used prefixes are: un, il, ir, dis, in, im, mis, etc ...

It is not so difficult to learn words with prefixes, as usually these prefixes are simply increased before the word, and as for the meaning most give the word a meaning opposite to what it had before, but there are also other cases

There is no grammatical rule to place these prefixes before a word, but after practice they are very intuitive

Examples

Prefix Ex
Refers to something old, previous. It is usually followed by a hyphen.
-wife / ex wife = wife / ex-wife
-boyfriend / ex-boyfriend = boyfriend / ex-boyfriend

Prefix Co
Denotes company, coauthor of. Generally it is accompanied by a script:
-starring / co-starring = protagonist / co-star, stars / co ...
-producer / co-producer = producer / co-producer

Prefix In
Means negation and translates in, no, without, absent from. Widely used for adjectives and nouns ending in TY (DAD):
-adequate / inadequate = adequate / inadequaten -direct / indirect = direct / indirect

Prefix Bio
Involves relationship with biology
-chemistry / biochemistry = chemistry / biochemistry
-wepons / biowepons = weapons / biological weapons

-diversity / biodiversity = diversity / biodiversity

Prefix My
Do something wrong, wrong, wrong, wrong. Usually accompanies without script to verbs:
-represent / misrepresent = represent / falsify
-print / misprint = print / commit errata

Prefix To
For even
-tifoid / paratyphoid = thyroid / parathyroid
-medic / paramedic = doctor / paramedic

prefijo Im
Inegación que significa lo contrario a, sin, in :
-possible/impossible = posible/imposible
-material/immaterial = material/inmaterial

Prefix Semi
Translates semi and partially indicates.
-circle / semicircle = circle / semicircle
-final / semifinal = final / semifinal

Examples

Prefix Dis
Denotes a negation that frequently accompanies nouns. It means des, in:
-arm / disarms = armed / disarmed
-infectant / disinfectants = infective / disinfectant

Prefix Sub
Means below, under. It has the same meaning as the prefix Under:
-marine / submarine = marine / submarine
-way / subway

Prefix Re
Means Again, Return or repetition of an action. Re is presented with verbs and can be joined by script:
-direct / redirect = direct / redirected
-come / return = come / return

Prefix Under
Means sub, des, minus, low. It has the same meaning as the prefix Sub:
-production / underproduction = production / subproduction
-developed / underdeveloped = developed / underdeveloped

Prefix In
It acts by positively increasing the noun that accompanies, means putting in the state of (in the sense indicated by the noun):
-danger / endanger = danger / endanger
-Large / enlarge = large / enlarge

Prefix Over
Over means over, over, over, over:
-time / overtime = time, time / overtime, over time
-charge / overcharge = charge / overload

Prefix A
Of negation type for causing sense contrary to that indicated by the root of the word. It means in, anti, little. It applies to adjectives, nouns, and verbs:
-equal / unequal = equal / uneven
-happy / unHappy = happy / unhappy
-faithful / unfaithful = faithful / unfaithful

Prefix Il
Il is a negation type translates ile-:
-legal / illegal = legal / illegal
-legitimate / illegitimate = legitimate / illegitimate

Prefix Pre
Precedes nouns and means before, before a.
-marital / premarital = matrimonial / premarital
-historic / prehistoric = historical / prehistoric

Prefix Anti
Means against. Usually appears in script
-wrinkle / anti-wrinkle = wrinkle / anti-wrinkle
-perspirant / antiperspirant = perspirant / antiperspirant

Multi prefix
multiplicity. It means multi.
-ethnic / multi-ethnic = ethnic / multi-ethnic
-player / multiplayer = player / multiplayer