difficultly

Computer-guided meditation is nice for those of us who have difficultly even understanding what focus feels like.

This fragrant residue was difficultly soluble in water and the solution reduced silver nitrate in ammonia.

The ions of the two metals may be separated and identified by means of difficultly soluble salts.

The word "difficulty" was sometimes employed as an adverb; herein it is converted to "difficultly" in this usage.

It is insoluble in water and ether, difficultly soluble in the hot; and fairly soluble in aniline.

This is the difficultly fusible Bohemian tube-glass, so valuable in chemical manipulations.