Adjective

(en adjective)

capable of being maintained or justified; well-founded

Back in the 1800s, many did not consider Darwin's theory of evolution to be tenable at all.

(of a defensive structure) capable of being defended against assault or attack; defensible

Adjective

(en adjective)

Characterized by speculation; based on guessing or unfounded opinions.

*

*:"Don't dare laugh at us!" smiled his sister. "I wish we were back in Tenth Street. But so many children cameand the Tenth Street house wasn't half big enough; and a dreadful speculative builder built this house and persuaded Austin to buy it. Oh, dear, and here we are among the rich and great; and the steel kings and copper kings and oil kings and their heirs and dauphins. Do you like the house?"

*{{quote-news, year=2011, date=June 4, author=Phil McNulty, work=BBC

, title= England 2-2 Switzerland , passage=Tranquillo Barnetta was the grateful beneficiary of uncertain England defending and poor goalkeeping from Joe Hart as he twice saw speculative free-kicks end in the back of the net in the first half.}}