am-

• ʋm (traditional)

am- (after another prefix -sam-, before consonants a̱-, class III first-person singular)

1. the indirect object of an active transitive verb

   to me, for me

2. the subject of an intransitive affective verb

   I

3. the direct object of a small set of transitive verbs mostly dealing with affect, communication and intimacy

   me

4. indicates possession of a noun

   my

• an- (when followed by a consonant which is not labial)

am-

1. Subject prefix for verbs; it indicates that the subject is second-person plural; you, you all.

Probably from a (demonstrative pronoun) +‎ -m (pronoun-forming suffix). It cannot be attested as an independent term. A direct derivation from ám is less likely.^[1]

• IPA^(key): [ˈɒm]

am-

1. The first element of a few compound pronouns and adverbs. The compounds were formed by syntactic adhesion, the role of the prefix is ​​emphasis, juxtaposition.

Prefixes used in correlatives (demonstrative adverbs)

common ones

• a- (from az)
• akár-, bár-
• épp-
• más-
• mind(en)-
• se(m/n)-
• ugyan-
• vala-

 

less common and/or improductive ones with limited scope

• am-, em-, im-
• csak-
• el-
• még-
• oly-
• szint-
• úgy-

 

From Proto-Celtic *am-, allophonic variant of *an- before *b and *ɸ.

With lenited m:

• IPA^(key): [aβ̃]

With unlenited m:

• IPA^(key): [am]

am-

1. Alternative form of an- (“un-, not”)

The lenited form is used before r, l, and n as well as a few vowel-initial forms that started with *ɸ in Proto-Celtic. The unlenited form is used before b and p.^[1]

From am (“about”).

• IPA^(key): /am/

am-

1. around, circum-

   ‎am- + ‎llen (“sheet”) → ‎amlen (“envelope”)

   ‎am- + ‎ysgrifio (“to write, to inscribe”) → ‎amsgrifio (“to circumscribe”)

   ‎am- + ‎cau (“to close”) → ‎amgáu (“to enclose”)

• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “am-”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies