kann

My friend can confirm this one on one.

Person B can't do anything with it.

The virus cannot infect other animals.

Where can I learn Vietnamese?

You can also eat carrots raw.

The sale of the playground can be prevented.

first/third-person singular present of können

(auxiliary, participle, past, preterite-present) to be able (to do or be something), to have the possibility of, can.
(intransitive, participle, past, preterite-present) to be able (to do or be something), to have the possibility of, can.
(participle, past, preterite-present, transitive) to be able (to do or be something), to have the possibility of, can.
(colloquial, intransitive, negative, preterite-present, regional) to be able (to do or be something), to have the possibility of, can.
(auxiliary, informal, participle, past, preterite-present) to be able (to do or be something), to have the possibility of, can.
(auxiliary, participle, past, preterite-present) to be able (to do or be something), to have the possibility of, can.
(informal, preterite-present) to be to blame, to be at fault