forte <> weak point

forthy <> gloomy

foster <> stifle

founder <> stay aloft

founder <> succeed

fracas <> peaceful discussion fragment <> coalesce

frailly <> not easy to crumb frequent <> shun

frequent <> visit rarely

fretful <> conciliation

fretful <> displaying equanimity fretful <> keep equanimity
friable <> difficult to crumb friable <> substantial

强音  <> 弱点

性格开朗友善的的  <> 忧郁的
鼓励  <> 抑制

沉没  <> 在高处

失败  <> 成功

吵闹  <> 平和的讨论

碎片  <> 结合

易碎地  <> 不容易弄碎

时常出入  <> 避开

常去  <> 很少去

使苦恼  <> 安慰

易怒的  <> 表现平静

烦恼的  <> 保持平静

易碎的  <> 难以压碎的