Hard; company (4)
I believe the answer is:
firm
I believe this is a double definition.
'hard' is the first definition.
(similar in meaning)
'company' is the second definition.
(firm can mean a company or business)
(Other definitions for firm that I've seen before include "Not soft or yielding to pressure" , "decided" , "Solid; secure" , "Solid - business" , "Resistant to pressure" .)