STRONG (19)

(superl.) Pertaining to, or designating, a verb which forms its preterit (imperfect) by a variation in the root vowel, and the past participle (usually) by the addition of -en (with or without a change of the root vowel); as in the verbs strive, strove, striven; break, broke, broken; drink, drank, drunk. Opposed to weak, or regular. See Weak.