Keep
Part of speech: noun
Definition: Care, notice. The main tower of a castle or fortress, located within the castle walls. The food or money required to keep someone alive and healthy; one's support, maintenance.
Part of speech: verb
Definition: To maintain possession of. To maintain the condition of. To remain in, to be confined to. To wait for, keep watch for. To restrain. To continue. To remain edible or otherwise usable. To remain in a state. To act as wicket-keeper. to raise; to care for.
Example sentence: Life is like riding a bicycle. To keep your balance, you must keep moving.
Observe
Part of speech: verb
Definition: To notice or view, especially carefully or with attention to detail.To follow the custom, practice, or rules (especially of a religion.)To comment on something; to make an observation.
Example sentence: Nature is a temple in which living columns sometimes emit confused words. Man approaches it through forests of symbols, which observe him with familiar glances.