advert (n.) Look up advert at Dictionary.com
colloquial shortening of advertisement, attested by 1860.
advert (v.) Look up advert at Dictionary.com
mid-15c., averten "to turn (something) aside," from Middle French avertir (12c.), from Late Latin advertere (see advertise). The -d- added 16c. on the Latin model. Related: Adverted; adverting.