to realise (fully understand)
The reflexive form is part of the word: se rendre compte.
On the card “to realise (fully understand)”, ripiti also accepts s'apercevoir de. Not the other way round: for s'apercevoir de, se rendre compte is not accepted.
Remember se rendre compte for good. ripiti brings the word back just before you forget it, with these sentences. Free, no account needed, works offline.
practise se rendre compte in ripiti