General "lack of" prefixes:
* a-: Indicates absence or lack of something, like in "amorphous" (without form).
* an-: Used before words starting with vowels, like in "anarchy" (without rule).
* non-: Indicates the opposite or absence of something, like in "non-existent."
* un-: Denotes the absence or reversal of something, like in "unimportant."
Specific prefixes for "nothing" in various contexts:
* nil-: Used for zero or nothing, as in "nil return."
* null-: Indicates emptiness or void, like in "null hypothesis."
* void-: Refers to an empty space or nothingness, as in "void of meaning."
* naught-: An archaic word for "nothing," can be used as a prefix, like in "naughtiness."
Ultimately, the best prefix to use depends on the specific meaning you want to convey.