What this suffix does
-kin comes from Middle Dutch "-kijn" (little). It was a productive diminutive suffix in Middle English that formed nouns meaning "small X" or "young X." lambkin = little lamb (term of endearment). catkin = the small, tail-like flower cluster of willows and birches. napkin = originally a small cloth ("nap" = cloth). Now standard everyday English. bodkin = a small pointed instrument (needle, pin or dagger).