This is the 10178th most frequent French word.
immanquablement
Invariably; inevitably.
Immanquablement is used here to show that the streets being filled with puddles is an inevitable and consistent occurrence when it rains.
Chaque fois qu'il pleut, les rues sont immanquablement remplies de flaques d'eau.
Every time it rains, the streets are invariably filled with puddles.
Immanquablement is employed to indicate that success in reaching the goal is unavoidable if the advice is followed.
Si tu suis ses conseils, tu réussiras immanquablement à atteindre ton objectif.
If you follow his advice, you will inevitably succeed in reaching your goal.
Immanquablement indicates that the falling of leaves from trees during autumn is a regular and predictable phenomenon.