俄 is a literary bound form (b.f.) meaning 'presently' or 'suddenly'. It appears in classical compounds like 俄而 ('after a while') and 俄顷 ('in a moment'). In modern Chinese, 俄 is more commonly seen as part of the transliteration 俄罗斯 (Russia), but this row covers the literary adverb usage. Because the English gloss 'presently' would not naturally translate back to 俄 (a learner would likely say 马上 or 立刻), the description clarifies the restricted, literary context.