我乍ら[warenagara] even if I say so myself
及ばず乍ら[oyobazunagara] to the best of my ability, poor though it be
乍ら[nagara] while
二つ乍ら[futatsunagara] both
然し乍ら[shikashinagara] however

末筆乍ら[mappitsunagara] letter-closing phrase expressing regret for a delay
余所乍ら[yosonagara] while at a distance
否否乍ら[iyaiyanagara] reluctantly
居乍ら[inagara] from where one sits
憚り乍ら[habakarinagara] with all due respect ...

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