Tolerable - Darcy of course calls EB tolerable at the Meryton assembly. But it is also used in Ch 18 after their dance at Netherfield where " in Darcy's breast there was a tolerable powerful feeling towards her (EB)". Why the tolerable qualifier here, and what is its meaning?

Disconcerted --- Kitty is disconcerted when her father (in the privacy of their family party) calls her (and Lydia) two of the silliest girls in the country, yet Mary is only somewhat disconcerted when she's embarrassed by her father during her exhibition at Netherfield. I would think Mary's situation more disconcerting than Kitty's. Again I am wondering about the qualifier used.