丁髷[chonmage] topknot (hair style)
丁抹[denmaaku] Denmark
沃度丁幾[youdochinki] tincture of iodine
拉丁[raten] Latin (language)
拉丁語[ratengo] Latin

亜爾然丁[aruzenchin] Argentina
一丁[icchou] one sheet
一丁字[itteiji] single letter or character
一丁目[icchoume] Block 1
吉丁虫[tamamushi] jewel beetle

一も二も無く[ichimonimonaku] unhesitatingly
一言二言[hitokotofutakoto] a word or two
一石二鳥[issekinichou] killing two birds with one stone
一二に及ばず[ichininioyobazu] right away
一姫二太郎[ichihimenitarou] It's good to have a girl first and then a boy

うり二つ[urifutatsu] as alike as two melons (two peas in a pod)
黄道十二宮[koudoujuunikyuu] twelve signs of the zodiac
二度[futatabi] again
最小二乗法[saishounijouhou] least-squares method
三十二分音符[sanjuunibuonpu] 32nd note

悪投[akutou] wild pitch
意気投合[ikitougou] hit it off with (a person)
一挙手一投足[ikkyoshuittousoku] slight effort
一般投票[ippantouhyou] referendum
円盤投げ[enbannage] discus throw

下手投げ[shitatenage] underhand throw
海外投資[kaigaitoushi] overseas investment
外国投資家[gaikokutoushika] foreign investor
間投詞[kantoushi] interjection
空中投下[kuuchuutouka] airdrop