| Answer | Crossword Clue |
|---|---|
| STRINGTHEORY | Hard-to-understand physics concept |
| RECONDITE | Hard to understand. |
| DEEP | Hard to understand. |
| ABSTRUSE | Hard to understand |
| OPAQUE | Hard to understand |
| ARCANE | Hard to understand |
| ABSTRACT | Hard to understand |
| CLEARASMUD | Hard to understand |
| ASMUD | Clear -- (hard to understand) |
| ESOTERICA | It's hard to understand |
| ENIGMA | It's hard to understand |
| EVIDENT | Not hard to understand |
| ASMUD | Clear ... (hard to understand) |
| ELUSIVE | Hard to understand or identify |
| JARGON | It's hard for laymen to understand |
| READABLE | Not hard to understand, as writing |
| GARBLEDMESSAGE | Hard-to-understand voicemail, e.g. |
| QUEENMUMBLE | Nickname for a hard-to-understand monarch? |
| DEEP | Hard to understand, as a math problem |
| MUMBLE | Be hard to understand, in a way |
