"edgewise" in the adverb sense
1. edgeways, edgewise
with the edge forward or on, by, or toward the edge
"he sawed the board edgeways"
"held it edgewise"
2. edgewise, edgeways
as if by an edge barely
"I could not get a word in edgewise"
Source: WordNet® (An amazing lexical database of English)
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