perpetuous
(firearms) A ringlike groove, such as that around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance...
A venodilatory agent
(rare) incessant; perpetual
plural of posterboy
彼女の絶え間ない不安のせいで眠るのが困難で、思考が途切れることなく何度もよみがえった。
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DiQt
Free
★★★★★★★★★★
