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in the PONS Dictionary

I. pre·fix <pl -es> N ['priːfɪks]

1. prefix LING:

prefix
prefiks m spec.
prefix

2. prefix (something prefixed):

prefix
to add sth as a prefix

3. prefix:

prefix (title)
prefix (Dr etc.)

4. prefix Brit (dialling code):

prefix

II. pre·fix VB trans [ˌpriː'fɪks]

to prefix sth with sth
Present
Iprefix
youprefix
he/she/itprefixes
weprefix
youprefix
theyprefix
Past
Iprefixed
youprefixed
he/she/itprefixed
weprefixed
youprefixed
theyprefixed
Present Perfect
Ihaveprefixed
youhaveprefixed
he/she/ithasprefixed
wehaveprefixed
youhaveprefixed
theyhaveprefixed
Past Perfect
Ihadprefixed
youhadprefixed
he/she/ithadprefixed
wehadprefixed
youhadprefixed
theyhadprefixed