Questions & Answers about Я сразу понял её намёк.
Понял is the past tense, masculine singular form of понять (to understand, to realize).
So Я сразу понял её намёк means a male speaker is talking.
If the speaker were female, it would be:
Я сразу поняла её намёк.
This is very common in Russian past tense: the verb agrees with the speaker or subject in gender and number.
Because понять is perfective, and here the sentence describes a single completed moment of understanding: the speaker got it right away.
- понял = understood / realized / got
- понимал = understood / was understanding in an ongoing, repeated, or background sense
With сразу (right away, immediately), Russian strongly prefers the perfective verb, because the idea is that understanding happened as one complete event.
So:
- Я сразу понял её намёк. = I understood her hint immediately.
- Я понимал её намёк. = more like I understood what she was hinting at / I was aware of her hint — not the same sudden realization.