candid
adj
not hiding one's thoughts; frank and honest 率直的; 坦白而誠實的
a candid opinion, statement, person 直言、 直說、 直性人
Let me be quite candid with you
your work is not good enough. 不瞞你說, 你的工作不怎麼好.
She always referred to them as 'the shifting population', for they came and went with such frequency that I never even got a chance to learn their names.