A Pocket Dictionary: Welsh-English

Ym, pref. reflects the action expressed by the word to which it is prefixed, on the actor; as LLOSGI, to burn; YMLOSGI, to burn one's self; CYFIAWNAD, justification; YMGYFIAWNAD...

F, Is of a similar sound to the English V; and is used as a mutation of m. and B. It is not a radical letter in the Welsh language, but the following words are commonly used

Es, n. separation; a shoot. It is used as a prefix, of a similar signification to ex; and also, as a termination of feminine personal nouns, and of the third person of verbs

Mae yr awyddfryd cynyddol sydd yn mhlith y Cymry i ymgydnabod yn fwy a'r iaith Saesoneg yn un o arwyddion gobeithiol yr amserau. Am bob un o'n cydgenedl ag oedd yn deall Saesone...

Ar, n. the faculty of speech: n. surface, ploughed land, prep. on, upon. Ar i fyny, upwards, ar i waered, downwards, pref. gives intensity to the signification of words; as arch...