ad is a preposition. Prepositions are not inflected and have no case. However, the preposition ad is always followed by the accusative case. For example, see the call to arms phrase ad arma! = literally: 'to the arms' (cf. 'alarm'). Where arma is the accusative neuter plural of the word that means 'arms, weapons.'
Latin for "to the matter" is ad rem
Yes, "Ad nauseum" comes from the Latin language.
Veni ad me Is Latin for: come to me
AD stands for Anno Domini which is Medieval Latin for 'In the year of (the/Our) Lord'
Ad astra per aspera is the Latin equivalent of 'To the stars at all costs'. In the word by word translation, the preposition 'ad' means 'to'. The noun 'astra', in the accusative case, means 'the stars'. The preposition 'per' means 'by, through'. The noun 'aspera', in the accusative case, means 'roughnesses, rough places'.
plus
ad lib is a latin abbreviation for 'freely'
What is appropriate?from Late Latin appropriātus, past participle of appropriāre, to make one's own : Latin ad-, ad- + Latin proprius, own.http://www.answers.com/appropriate
ad te
"Ad loco."
ad villam
Ad