Usages of зачем-то
Зачем‑то он ставит будильник на шесть утра, хотя в школу ему к восьми.
For some reason he sets his alarm for six in the morning, although he has to be at school by eight.
Иногда дядя зачем‑то выходит куда‑то без телефона, и мы не можем ему позвонить.
Sometimes my uncle for some reason goes out somewhere without his phone, and we can’t call him.
Elon.io is an online learning platform
We have an entire course teaching Russian grammar and vocabulary.