costliest

the most costliest option was beyond our budget.

this project proved to be the costliest one we've ever undertaken.

healthcare is often the costliest expense for families.

the costliest mistake was not doing our research first.

finding the costliest hotel in the city was our first task.

the costliest part of the renovation was the kitchen.

we avoided the costliest route to save time and money.

the costliest lawsuit in the firm's history is ongoing.

the costliest commodity was oil, impacting global markets.

the costliest repairs were due to the severe storm.

we compared the costliest and cheapest flights available.