| Open or unfasten a door perhaps |
UNLATCH |
| Profound knowledge |
ERUDITION |
| Remove by filtration |
STRAIN |
| Removed whitewash from a reputation |
DEBUNKED |
| Roman emperor assassinated in 41AD |
CALIGULA |
| South American tree-dwelling animal |
KINKAJOU |
| Space entirely filled with matter (opposite of vacuum) |
PLENUM |
| Substance providing nourishment |
NUTRIENT |
| That which has same fundamental structure as something else |
Homotype |
| Thinking intently and at length |
STUDYING |
| Thomas - - , British physicist 1805-69 |
GRAHAM |
| Three-letter combination for one sound |
TRIGRAPH |
| Undignified leading character |
ANTIHERO |
| Unit of currency in Kabul |
AFGHANI |