Lest

He carried an umbrella in his backpack lest it rained.

He wore a helmet while riding his motorcycle lest he gets injured in an accident.

He walked carefully, lest he slip on the wet floor.

He studied hard for the exam lest he fails it.

They kept a distance from the wild animals in the safari lest they get attacked.

He stayed silent, lest he reveal his true feelings.

She didn't eat the seafood, lest she get sick.

She left early for the airport lest she miss her flight.

He always locks the door at night lest any intruder enters.

He avoided spicy food, lest he upset his stomach.

They turned off their phones, lest they be disturbed during the movie.

They packed extra food, lest they get hungry on the hike.

The thought of failure was a lest for her, so she worked hard to avoid it.

For him, speaking in public was a lest that he had to conquer.

He speaks in a hushed tone, lest he should wake the baby.

She tiptoed across the room, lest she should be heard.

The driver slowed down, lest he should hit the deer.

She avoided spicy food, lest it upset her stomach.

The soldiers marched in silence, lest they should be detected.

The teacher repeated the instructions, lest anyone should misunderstand.

He wore a helmet, lest he should get hurt in the accident.