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To lend – to let someone borrow something for a period of time. e.g. The library lends books to the public.
I lend (present simple) I lent (past simple) I have lent (past participle)
To lean – to move towards something or someone. e.g. I lean against the tree while I am reading my book.
I lean (present simple) I leant (past simple) I have leant (past participle)
Pronunciation: lent and leant sound exactly the same!