yet - adverb

• up to the present time
• used in negative statement to describe a situation that has existed up to this point or up to the present time
• to a greater degree or extent; used with comparisons
• within an indefinite time or at an unspecified future time
• used after a superlative
• despite anything to the contrary (usually following a concession)

yet - thesaurus

even   heretofore   hitherto   however   nevertheless   nonetheless   notwithstanding   still   withal