掻攫う[kassarau] to nab
藻掻く[mogaku] to struggle
悪足掻き[waruagaki] useless resistance
引掻く[hikkaku] to scratch
隔靴掻痒[kakkasouyou] being frustrated because something is not quite as hoped (just as one cannot scratch an itch from outside a shoe)

汗を掻く[asewokaku] to perspire
犬掻き[inukaki] dog paddle (swimming style)
掻き回す[kakimawasu] to stir up
掻き合わせる[kakiawaseru] to adjust
掻き込む[kakikomu] to carry under the arm

機関[karakuri] mechanism
アナログ計算機[anarogukeisanki] analog computer
エンジン発動機[enjinhatsudouki] engine
サーボ機構[saabokikou] servomechanism
シフト演算機構[shifutoenzankikou] shift arithmetic unit

ジェット機[jettoki] jet aeroplane
弾機[hatsujou] spring (e.g. coil, leaf)
ヒグス機構[higusukikou] Higgs mechanism (physics)
プロペラ機[puroperaki] propeller-driven aircraft
圧延機[atsuenki] rolling machine

碓氷峠[usuitouge] Usui Pass
月下氷人[gekkahyoujin] go-between
砕氷船[saihyousen] ice breaker
削氷機[sakuhyouki] ice-shaving machine

樹氷[juhyou] frost covered trees
製氷[seihyou] ice making
そう氷[souhyou] pack ice
欠氷[kakigoori] shaved ice (usually served with flavored simple syrup)