?担心

... be angry at因某事生气 be anxious about担心，为…担忧 be aware of意识到 (来源：英语交友 ) ...

?忧虑

... be afraid of害怕 be anxious about忧虑,担心 be apparent to明显，明了 ...

?牵挂

... [odd] 比指出的整数或比指出的近似数量稍多一点 [be anxious about] 牵挂;挂念 [wall calendar] 挂在墙上用的月历或年历 ...

?引申为忧虑

... ◎ [consider] 思考, 考虑 ◎ [worry;be anxious about] 引申为忧虑 ◎ [show tender affection for] 爱怜 ...