difficult / hard, probably impossible

noise, chaos, bustle

noisy, chaotic, clamorous

concentrate

concentration

(chiefly women's speech) first person singular pronoun: I, me

private; mine

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

a personal or private matter / (by extension) selfishness

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