puzzle
noun
a toy, problem, or other contrivance designed to amuse by presenting difficulties to be solved by ingenuity or patient effort.
Used to describe an action that will be fully completed or achieved by a specific point in the future.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Chelsea lacked verve and adventure, something that will also sustain Mourinho's critics, but it was having to accuse his players of failing to cope with pressure that will have puzzled and concerned him most.
From BBC ● Mar. 12, 2015