Toward the east; in an eastward direction or manner.
From 'eastward' (east + -ward, meaning direction) + '-ly' (adverbial suffix). This double-suffixing pattern (-ward + -ly) creates an adverb from an already directional adjective.
English has a weird relationship with directional adverbs—we mostly say 'eastward' alone, but adding '-ly' was once common for emphasizing the manner of movement, like saying 'toward the east in that specific way.'
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