Requiring more effort

• More challenging
• Taking more time, probably, as a test
• Taskmaster's cry
• More demanding
• Less simple
• Not so easy
• Less lenient
• More steely

WordNet Word definitions in WordNet
adv. with effort or force or vigor; "the team played hard"; "worked hard all day"; "pressed hard on the lever"; "hit the ball hard"; "slammed the door hard" with firmness; "held hard to the railing" [syn: firmly ] earnestly or intently; "thought hard about ...

Wiktionary Word definitions in Wiktionary
Etymology 1 a. (en-comparative of: hard) Etymology 2 n. (context South Africa English) Any of several species of mullet often used to make bokkoms.