Take heed — prŏsĕchō - To be in a continuous state of readiness to learn of any future danger, need, or error, and to respond appropriately—to pay attention to, to keep on the lookout for, to be alert for, to be on one’s guard against
Unexpectedly - aiphnidiŏs - An extremely short period of time between a previous state or event and a subsequent state or event—suddenly, at once, without warning
Snare - pagis - Like a trap; unexpectantly