ad-
/ad/
prefix
Origin
Latin
ad — to, toward
Overview
Meaning Now
- A prefix occurring in loanwords from Latin, where it meant 'to' or 'toward', often undergoing assimilation to the following consonant (e.g., ad- + spectare > aspect).
Literal older meaning
to, toward
Language path
Proto-Indo-European → Latin → English
Earliest form
ad
Earliest period
Classical Latin
Journey
The Latin preposition 'ad' is a quintessential example of how morphological prefixes are formed from functional prepositions. In English, it entered both through direct borrowing of Latin verbs (e.g., 'admit', 'adopt') and through French intermediaries which often simplified the cluster (e.g., 'achieve' from 'ad-capere').
Evolution
- Proto-Indo-European
*ad-
“near, at”
Reconstructed PIE root.
- Old Latin
ad
“to, toward”
Prepositional usage.
- Classical Latin
ad-
“to, toward”
Used as a prefix in compound verbs.
- Old French
a-
“to”
Many Latin 'ad-' words passed into English via Old French, often losing the 'd'.
- Middle English
ad- / a-
“to, toward”
Re-borrowings from Latin restored the 'd' in many scientific and formal terms.
Connections
Word parts
ad-
prefix
to, toward
Related across languages
Old English
æt
at
Old High German
az
at, to
Explore next
Related to ad-
External references use DefinedTerm semantics.