[bot.tle.neck] adj (1896): narrow "~ harbors"
[2]bottleneck n (1907) 1 a: a narrow route b: a point of traffic congestion
2. a: a condition or situation that retards or halts free movement and progress b: impasse
3: a style of guitar playing in which glissando effects are produced by sliding an object (as a knife blade or the neck of a bottle) along the strings [3]bottleneck vt (1933): to slow or halt by causing a bottleneck