Dic: spell (one of its meanings as a verb)

3. VERB : no cont

If something spells a particular result, often an unpleasant one, it suggests that this will be the result.

• If the irrigation plan goes ahead, it could spell disaster for the birds.

... Cobuild

3. To add up to; signify:

• Their unwise investment could spell financial ruin.

... American Heritage, http://www.thefreedictionary.com/spell