Rashi on Genesis 34:15/רש"י על בראשית ל״ד:ט״ו

1נאות לכם means WE WILL CONSENT UNTO YOU: it has the same meaning as (2 Kings 12:9) ויאותו “and they consented”.

2להמול means TO BE CIRCUMCISED — It is not an active infinitive (Kal), but a passive infinitive (Niphal).