This is the 1336th most frequent Japanese word.
いよいよ
"いよいよ" means "finally," "more and more," or "at last," often indicating anticipation or a climactic moment.
The word 'いよいよ' indicates that the anticipation or lead-up to this moment has finally resulted in the realization of the dream.
いよいよ彼の夢が実現しました。
At last, his dream has come true.
Here, 'いよいよ' expresses the culmination of waiting or preparation leading to the beginning of summer vacation.
いよいよ夏休みが始まります。
The summer vacation is finally starting.
In this case, 'いよいよ' denotes a sense of approaching culmination or an event that has been anticipated.