obscure

Objectionable-C | = O = | octal forty

obscure adj.

Used in an exaggeration of its normal meaning, to imply total incomprehensibility. "The reason for that last crash is obscure." "The `find(1)` command's syntax is obscure!" The phrase `moderately obscure' implies that something could be figured out but probably isn't worth the trouble. The construction `obscure in the extreme' is the preferred emphatic form.

Objectionable-C | = O = | octal forty