Learn Turkish: Sakar çocuk çiçeği koparıverdi. - The clumsy child suddenly plucked the flower.

The main verb is koparmak (to pluck). We take the stem kopar- and add the 4-way vowel harmony linker -ı- (because the last vowel in the stem is 'a'). Then we attach the suddenness verb -ver, and finally the past tense suffix -di. Together, koparıverdi gives the feeling that the child plucked the flower very quickly, unexpectedly, or carelessly.

Is the verb koparmak related to kopmak (to break off / snap)?

Yes, it is! Kopmak is an intransitive verb meaning a thing breaks off or detaches on its own (like a rope snapping). By adding the suffix -ar, it becomes koparmak, which is transitive—meaning someone causes the breaking, or "plucks" something. Because the child is doing the action to the flower, we must use the transitive koparmak.

Why does the word for flower (çiçek) change to çiçeği?

Two rules are working together here. First, because the child is plucking a specific flower ("the flower"), it needs the accusative case ending -i. Second, Turkish has a consonant mutation rule: when a word ends in k and receives a suffix starting with a vowel, the k almost always softens into a ğ (soft g). So, çiçek + i becomes çiçeği.

Could we put the adjective (clumsy) somewhere else in the sentence?