出典:Wiktionary
From Middle English fastly, fastliche, festliche, from 古期英語 fæstlīċe (“firmly, constantly”), from Proto-West Germanic *fastulīko, from Proto-West Germanic *fastulīk (“secure, firm”); equivalent to fast + -ly.
fastly (comparative more fastly, superlative most fastly)
fastly (comparative more fastly, superlative most fastly)
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with rapidity
素早く動くさま
吸着するさま
more quickly
迅速に.
よりゆっくりと
the moment soon after something