po·ny·tail 
(pōnē-tāl′)
(pōnē-tāl′)n.
A gathering of hair that is fastened close to the head so that the hair hangs down like a pony's tail.
pony·tailed′ adj.
- improper fraction
- improper integral
- improperly
- improperness
- impropriety
- improv
- improvable
- improvably
- improve
- improvement
- improvidence
- improvident
- improvidently
- improvisation
- improvisational
- improvisationally
- improvisator
- improvisatorial
- improvisatory
- improvise
- improviser
- improvisor
- imprudence
- imprudent
- imprudently