back-formation

n [U, C] (process of making a) word that appears to be the root of a longer word, eg televise from television 逆构词（该词看来像是某一较长单词的词根, 如由television逆造出 televise）; 逆序造词法.

Bach, bachelor, bacillus, back, back and forth, back away, back down, back down off, back down/off, back number, back of, back out of, back road, back room, back seat, back talk, back up, back-bench, back-bencher, back-breaking, back-pedal, back-up, back-yard, backache, backbite, backbiter, backbiting, backbone, backchat, backcloth, backcomb (also tease), backdate, backdrop, backer, backfire, backgammon, background, backhand, backhanded, backhander,