Irregular conjugation for ther verbs "verzeihen", "leihen", their compounds and the verb "gedeihen": there is a change of the stem vowel in the stem of Present tense ("ich verzeihe") and the stem of Preterite ("ich verzieh") and the stem of Past Participle ("verziehen"). The verbs "weihen", "reihen" and their compounds follow other conjugation pattern.
9 verbs follow this model. Below an extract:
To see other models, refer to Model Table
Based on the ending, you can identify features that different verbs have in common. Click on the verbs above to see their conjugation tables and explore their conjugation patterns.