(formal) first-person singular pronoun: I, me

personal, private / secret

a personal or private matter / selfishness / privacy, secrecy / (women's speech, obsolete) a brother-in-law

Alternative spelling of 私達 (“we; us”)

private; mine

(idiomatic) to feel inferior, to feel small

数:

吸う: breathe, inhale, suck

数字: numbers / 数次: number of times

水筒: canteen / 水痘: varicella / 水套: water jacket / 水稲: grain grown in a paddy field / 水頭: by the water / 水頭: energy represented by a column of water / 出納: adding and removal of money and goods