In a way that is reasonable to expect; as one would naturally anticipate.
Adverbial form of expectable, using the suffix -ly. This creates a parallel to how 'probably' relates to 'probable'—the adverb form lets you describe how something happens.
Writers use 'expectably' when they want to say something happened in the unsurprising way—like 'expectably, the student who studied passed the test.' It's a quieter, more sophisticated way to say 'as expected.'
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