This is the 1351st most frequent French word.
partiellement
Partially.
Here, 'partiellement' implies that the window is open to a certain degree, not completely, hence allowing partial airflow.
La fenêtre est partiellement ouverte, laissant entrer un peu d'air frais.
The window is partially open, letting in some fresh air.
In this context, 'partiellement' denotes that the project is completed to some extent, but not in its entirety.
Le projet a été partiellement réalisé en raison de contraintes budgétaires.
The project was partially completed due to budget constraints.
Here, 'partiellement' indicates that the testimony consists of some accurate information but contains inaccuracies as well.