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To quote "Strunk & White":
Flammable is an oddity, chiefly useful in saving lives. The common word meaning "combustible" is "inflammable." But some people are thrown off by the "in-" and think "inflammable" means "not combustible." For this reason, trucks carrying gasoline or explosives are marked "flammable." Unless you are operating such a truck and hence are concerned with the safety of children and illiterates, use "inflammable."
Thank you Strunk & White; I wish others would use proper English.
Abandon this advice, for the safety of future generations. The word inflammable must be driven to extinction.
Please...you speak from ignorance. While flammable is a relatively recent derivation of inflammable, both are accepted.
Is it not easier to say that flammable and inflammable is the same! Goodness! I spent quiet a time to comprehend your "explanation" with a dictionary. I should do it direct, without your site only confusing readers. Never will come back.