un·tie 
/ˌʌnˈtaɪ/ verb
un·ties; un·tied; un·ty·ing /ˌʌnˈtaɪ/ verb 1 : to undo the knots in or of (something) [+ obj] ▪ She untied her shoelaces/shoes. ▪ He untied the package and opened it. ▪ untie a rope ▪ Your shoelaces are untied. [no obj] ▪ The knot untied easily. 2 [+ obj] : to remove the rope, string, etc., that attaches (something or someone) to something
▪ She untied the horse from the post.
▪ She untied the horse from the post.
