A Dio

My God!

aba

father, dad, daddy

abi gezunt

"As long as you're healthy [you can be happy]."

acharon acharon chaviv

"The very last one is beloved."; "Last but not least."

achshav

Now, immediately

ad kdei kach

so much. has it gone this far? (Weiser: "expression of wonder regarding the extent or intensity of something.")

ad me'ah v'esrim

[may you/he/she live] "until a hundred and twenty" -- often used as a birthday wish for long life, or when mentioning a person who is getting on in years.

aderaba

certainly, by all means; I certainly don't object

on the contrary

Adonai

"Literally, 'my Lord', another word for God." (JPS)

afikomen

a piece of matzah from the Passover seder traditionally hidden by adults, found by the children (or vice versa), and then ransomed for gifts after the meal. "The last piece of matzoh...eaten at the meal." (Steinmetz)