Realise
Part of speech: verb
Definition: To make real; to convert from the imaginary or fictitious into reality; to bring into real existence
Example sentence: Life is short and the older you get, the more you feel it. Indeed, the shorter it is. People lose their capacity to walk, run, travel, think, and experience life. I realise how important it is to use the time I have.
Understand
Part of speech: verb
Definition: To be aware of the meaning of.To believe, based on information.To impute meaning, character etc. that is not explicitly stated.To apply values (axioms).
Example sentence: Religion is the impotence of the human mind to deal with occurrences it cannot understand.