adverb/siˈkjeɾa/
at least, at the least; even
“Él molesta tanto que ni siquiera los sordomudos pueden soportarlo.” — He's so annoying that not even deafmutes can tolerate him.
Univerbation of si + quiera, literally “if [one] wants”; cf. also Old Spanish siquier, possibly from Latin sī quaerit. Cognate with Portuguese sequer.