[1715–25; blithe + -some1]This word is first recorded in the period 1715–25. Other words that entered Englishat around the same time include: blackleg, cowboy, hallmark, leverage, trio-some is a native English suffix formerly used in the formation of adjectives. Other wordsthat use the affix -some include: awesome, burdensome, nettlesome, troublesome, venturesome