Ponderings

Why is the plural of "practicum" not "practica"?

Why can you say that someone was "nonchalant", but you can't say that someone did something in a "chalant" manner?

Why, no matter how many times I look up the definitions, can I *never* remember what "hegemony" and "heuristic" mean?

How long can I continue to use the excuse that my place is so disorganized because "my roommate just moved out, and I haven't yet had any time to reorganize my stuff since she left"?