worry about

忧虑

world-famous, world-weary, world-wide, worldliness, worldly, worldly-wise, worldwide, worm, worm-cast, worm-hole, wormeaten, wormwood, wormy, worn, worn-out, worried, worriedly, worrier, worrisome, worry, worrying, worse, worse off, worsen, worship, worshipful, worst, worsted, worth, worthily, worthiness, worthless, worthlessness, worthwhile, worthy, worthy of, would, would rather, would rather do, would rather...than,