suf·fix 
/ˈsʌfɪks/ noun
plural suf·fix·es /ˈsʌfɪks/ noun [count] : a letter or a group of letters that is added to the end of a word to change its meaning or to form a different word
▪ The adjective “smokeless” is formed by adding the suffix “-less” to the noun “smoke.” ▪ The adverb “sadly” is formed by adding the suffix “-ly” to the adjective “sad.” — compare affix, prefix
▪ The adjective “smokeless” is formed by adding the suffix “-less” to the noun “smoke.” ▪ The adverb “sadly” is formed by adding the suffix “-ly” to the adjective “sad.” — compare affix, prefix
