Learn how to say Observationally correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word observation:
1 [mass noun] the action or process of closely observing or monitoring something or someone:
she was brought into hospital for observation
units kept enemy forces under observation for days
detailed observations were carried out on the students’ behaviour
the ability to notice things, especially significant details:
his powers of observation
the act of taking the altitude of the sun or another celestial body to find a latitude or longitude.
2a statement based on something one has seen, heard, or noticed:
he made a telling observation about Hughie
late Middle English (in the sense ‘respectful adherence to the requirements of rules or ritual’): from Latin observatio(n-), from the verb observare (see observe)