免不了
unavoidable; can't be avoided
免不得
unavoidable; bound to (happen)
不眠不休
without stopping to sleep or have a rest (idiom)
睡眠不足
lack of sleep; sleep deficit
知人知面不知心
one may know a person for a long time without understanding his true nature (idiom)
缠绵不已
to cling without letting go; to pester without end; to cling lovingly to each other