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.
wary - marked by keen caution and watchful prudence; they were wary in their movements; a wary glance at the black clouds; taught to be wary of strangers. awake - not in a state of sleep; completely conscious; lay awake thinking about his new job; still not fully awake.