Lake turnover occurs when the layers of water with noted temperature differences begin to mix together and the water and debris that has been sitting at the bottom of the lake begins to mix with the layers of water above it.
Definition of cautious. : careful about avoiding danger or risk cautious investors cautious optimism.
They have good self-esteem, but can still be plagued by self-doubt. Self-esteem can be defined as someone who has a decent opinion of self without grandiosity. One who sees self as a good person, hard working, reliable, honest, friendly, and able to like and love him or herself for who they are. This does not mean that self-doubt will never crop up.