A question

[Hassan Mukdad]

I am Hassan Mukdad, ESL learner..
1- I would like to ask about the difference between adjectives such as:
economic and economical
2- I would like to ask also about the usage of the word "Lest".
Thank you very much

[knowledgeseeker]

Economic is concerned with the economy or money that a society or an individual has. Economical is spending or using something in a careful manner.

Lest is a conjunction. It is used in a sense of preventing something from happening e.g work hard lest you be failed. He ran lest he be caught by the angry mob. Its synonym is "in case."

Am I right tdol