永久歯[eikyuushi] permanent tooth
永久性[eikyuusei] permanency
永久脱毛[eikyuudatsumou] removing hair permanently
久しい[hisashii] long
久しく[hisashiku] for a long time

久し振りに[hisashiburini] after a long time
久し振り[hisashiburi] a long time (since the last time)
久懐[kyuukai] long-cherished hope
久慈目[kujime] spotbelly greenling (Hexagrammos agrammus)
久方[hisakata] sky

アナログデジタル変換器[anarogudejitaruhenkanki] analog-digital converter
パリティ変換[paritihenkan] parity transformation (physics)
異変[ihen] unusual phenomenon
移り変り[utsurikawari] change (e.g. season)
一定不変[itteifuhen] invariable

一風変った[ippuukawatta] eccentric
一変[ippen] complete change
黄変米[ouhenmai] spoiled rice
化学変化[kagakuhenka] chemical change
かな漢字変換[kanakanjihenkan] kana-kanji conversion (on a computer, etc.)

アラビア数字[arabiasuuji] Arabic numeral
サンプリング周波数[sanpuringushuuhasuu] sampling frequency
シグモイド関数[shigumoidokansuu] sigmoid function
スカッシング関数[sukasshingukansuu] squashing function
ステップ関数[suteppukansuu] step function

ブーリアン関数[buuriankansuu] Boolean function
圧倒的多数[attoutekitasuu] overwhelming numbers
異数[isuu] unusual
員数[inzuu] numbers of members (things, people)

永遠[eien] eternity
永久歯[eikyuushi] permanent tooth
永久性[eikyuusei] permanency
永久脱毛[eikyuudatsumou] removing hair permanently
永訣[eiketsu] last farewell

永劫[eigou] eternity
永小作[eikosaku] perpetual land lease
永子作権[eikosakuken] perpetual land lease
永寿[eiju] long life
永住[eijuu] permanent residence