13-letter words containing r, u, f, i
- unelectrified — not powered by electricity
- unfalteringly — to hesitate or waver in action, purpose, intent, etc.; give way: Her courage did not falter at the prospect of hardship.
- unfamiliarity — not familiar; not acquainted with or conversant about: to be unfamiliar with a subject.
- unforeskinned — circumcised
- unforthcoming — coming, forth, or about to come forth; about to appear; approaching in time: the forthcoming concert.
- uninformative — not educational
- unmistrustful — not mistrustful
- unpersonified — to attribute human nature or character to (an inanimate object or an abstraction), as in speech or writing.
- unrectifiable — able to be rectified.
- unrefined oil — oil that hasn't been refined or processed
- unsuperficial — external or outward: a superficial resemblance.
- unthriftiness — the quality or condition of being unthrifty
- unthriftyhead — thriftlessness
- unvitrifiable — not able to be vitrified
- user-friendly — easy to use, operate, understand, etc.: the most user-friendly personal computer now on the market.
- vacuum filter — A vacuum filter is a filter in which the liquid passes through more easily because of a vacuum on the liquid output side.
- visual foxpro — (database) A Microsoft database derived from Fox Software's FoxPRO.
- white truffle — an edible fungus, Tuber magnatum pico, occurring in certain parts of northern Italy, and considered a great delicacy.
- work function — Physics. the least energy necessary to free an electron from a metal surface.
- working fluid — a liquid or gaseous working substance.