furan - a colorless toxic flammable liquid used in the synthesis of nylon. furane, furfuran. organic compound - any compound of carbon and another element or a radical. nitrofuran - derivative of furan used to inhibit bacterial growth.
precarious adjective. âº in a âdangerous âstate because of not being âsafe or not being âheld in âplace âfirmly: The âlorry was âlodged in a very precarious way, with âits âfront âwheels âhanging over the âcliff.
LINK / CITE ADD TO WORD LIST. adjective. The definition of insurmountable is something that is too difficult or too great to overcome. An example of something that would be described as insurmountable is an obstacle for which there truly is no way to get around.