13-letter words containing sib
- unimpressible — not capable of being or willing to be impressed
- unpermissible — that can be permitted; allowable: a permissible amount of sentimentality under the circumstances; Such behavior is not permissible!
- unresponsible — answerable or accountable, as for something within one's power, control, or management (often followed by to or for): He is responsible to the president for his decisions.
- visible light — the part of the electromagnetic spectrum that humans perceive