どん底[donzoko] very bottom
井底[seitei] well bottom
海底[kaitei] bottom of the ocean
海底ケーブル[kaiteikeeburu] undersea cable
丸底[maruzoko] round-bottom

基底[kitei] base
靴底[kutsuzoko] shoe sole
黒底翳[kurosokohi] black cataract
根底[kontei] root
周知徹底[shuuchitettei] (something) known to all

曳く[hiku] to pull
曳火弾[eikadan] tracer bullet
曳光弾[eikoudan] tracer bullet
曳航[eikou] towing (a ship)
曳子[hikiko] jinrikisha puller

綱曳き[tsunahiki] tug of war (orig. a form of divination to predict whether the year will be favourable or unfavourable)
曳き船[hikifune] tugboat
媾曳き[aibiki] (lover's) date
曳曳[eiei] heaving
曳網[hikiami] dragnet

一網打尽[ichimoudajin] (a) big haul
魚網[gyomou] fishing net
金網[kanaami] wire netting
交通網[koutsuumou] traffic network
公衆網[koushuumou] public network

叉手網[sadeami] dip net
刺し網[sashiami] gill net
支店網[shitenmou] branch store network
神経回路網[shinkeikairomou] biological neural network
粗い網[araiami] coarse net