Which morpheme means 'to slide'?

Which morpheme means 'to slide'?

• A. Lux(o)
• B. Lapse
• C. Lumph(o)
• D. Lith(o)

Answer: (A)

The idea being tested is matching a morpheme to its core meaning. The morpheme for “to slide” is laps- (as in lapse, relapse, elapse), which comes from a root meaning to slip or glide. That sense shows up in words where things slip or pass by. In contrast, lux- means light, lith- means stone, and lumph-/lymp- roots are connected to fluids or lumps, not sliding. So the morpheme meaning “to slide” is the laps- form, represented by the word lapse.

The idea being tested is matching a morpheme to its core meaning. The morpheme for “to slide” is laps- (as in lapse, relapse, elapse), which comes from a root meaning to slip or glide. That sense shows up in words where things slip or pass by. In contrast, lux- means light, lith- means stone, and lumph-/lymp- roots are connected to fluids or lumps, not sliding. So the morpheme meaning “to slide” is the laps- form, represented by the word lapse.