simple past tense and past participle of sting

A male animal, especially a stud horse (stallion), kept for breeding. / A female animal, especially a studmare (broodmare), kept for breeding. / (by extension, collective) A group of such animals.

A small object that protrudes from something; an ornamental knob. / (jewelry) A small round earring.

To set with studs; to furnish with studs. / To be scattered over the surface of (something) at intervals. / To set (something) over a surface at intervals.

Clipping of student.

(usually academic) To review materials already learned in order to make sure one does not forget them, usually in preparation for an examination. / (academic) To take a course or courses on a subject.

Mental effort to acquire knowledge or learning. / The act of studying or examining; examination. / Any particular branch of learning that is studied; any object of attentive consideration.

present participle of stuff

The matter used to stuff hollow objects such as pillows and saddles. / Any of many food items used to stuff another. / A mixture of oil and tallow used in softening and dressing leather. / Severe defeat

(informal) Miscellaneous items or objects; (with possessive) personal effects. / (obsolete, uncountable) Furniture; goods; domestic vessels or utensils. / (informal) Unspecified things or matters.