15-Letter Words Containing: F,F,I,S,_

• in an ineffective manner

• lacking the power to be effective

• A technique used to detect the reaction between an antigen and an antibody by observing the behavior of a combination of such species as they diffuse through a gel

• power to be effective; the quality of being able to bring about an effect

• capacity to produce strong physiological or chemical effects

• A device that uses diffraction (especially X-ray diffraction) to investigate the structure of matter.

• a disposition to be distant and unsympathetic in manner

• a lack of competence

• (pathology) inability of a bodily part or organ to function normally

• lack of an adequate quantity or number

• the bearing of fruit

• organs of fruiting (especially the reproductive parts of ferns and mosses)

• the quality of being frightful