at ease
1．without worry or nervousness；comfortable安适；自在；自如
His mind was never at ease from the first day he got married．从结婚的第一天起，他心里就没有平静过。
After the doctor's visit， the patient felt more at ease．经医生出诊看过后，病人感觉舒服多了。
2．having facility or readiness才思敏捷
She is quite at ease in speaking English．她英文说得十分流畅。