出典:Wiktionary
From Middle English sumerlich, sumerlic, from 古期英語 sumorlīc, sumerlīċ (“summerly”), equivalent to summer + -ly. Cognate with Dutch zomerlijk (“summerly”), German sommerlich (“summerly”), Danish sommerlig (“summerly”), Swedish sommarlik (“summerly”).
summerly (comparative more summerly, superlative most summerly)