glide 
(glīd)
(glīd)v. glid·ed, glid·ing, glides
v.intr.
1. To move in a smooth, effortless manner: a submarine gliding through the water. See Synonyms at slide.
2. To move silently and furtively: The thief glided across the room.
3. To occur or pass imperceptibly: The autumn days glided by.
4. To fly without propulsion from wings or an engine.
5. Music To blend one tone into the next; slur.
6. Linguistics To articulate a glide in speech.
v.tr.
1. To cause to move or pass smoothly, silently, or imperceptibly: glided the key into the lock.
2. To operate or fly (an aircraft) without propulsion from wings or an engine: She glided the paraglider over the trees.
n.
1. The act of gliding.
2. Music A slur.
3. Linguistics
a. The transitional sound produced by passing from the articulatory position of one speech sound to that of another.
b. See semivowel.
[Middle English gliden, from Old English glīdan; see ghel-2 in the Appendix of Indo-European roots.]