Smoking is expensive because of taxes. Cigarettes are seen as an unnecessary luxury at best and so are often targeted for tax increases. As a result more than 50% of the cost of cigarettes is tax.
On the rare occasion that cigarettes are available without paying taxes (Indian reservations or military bases) they are much less expensive.
The superlative for costly is "most costly" or "costliest."
Costly.
Yes, costly is an adjective. E.g. It was a costly mistake. (One that was expensive to fix, or that led to other bad consequences.)
It should be most costly.
costlier, costliest
The opposite of costly can be cheap, inexpensive, or affordable.
No Silicon is not costly. Pensil is of 3rupees in Pakistan
The duration of Her Costly Affair is 1.6 hours.
Secondhand smoking means the passive smoking and passive smoking is worse even than smoking cigarettes.
Ans: The costly material in concrete is cement
Anthony Costly was born on 1954-12-13.
Her Costly Affair was created on 1996-10-28.