much harder

This process has become much harder throughout the years.

Creating Knockout rats is much harder and only became possible in 2003.

"The Paralympics are so much harder than the able-bodied side of sport.

even harder

He started running even harder last spring and summer.

A particularly bad experience in the Chicago World's fair makes things even harder for Buddy.

Veslemøy has to fight even harder with her demons, and is once again taken into the mountains.

work harder   (より努力する)

But I work harder than the others.

It convinced Trevino to work harder on strategy and improving her defense.

The animals work harder with the promise of easier lives with the windmill.

make it harder   (難しくする)

This rule probably developed to make it harder to run out after the first shot.

They hyperpolarize the membrane and make it harder for a cell to have an action potential.

However, this can make it harder to recognise that a given word is intended as an acronym.

making it harder

Aging may affect memory by changing the way their brain stores information and by making it harder to recall stored information.

The change was made to prolong the race, giving lesser known candidates a chance and making it harder for a frontrunner to secure the majority early.

Hard wire is very stiff and tends to spring back after being bent, making it harder to work with when using a jig; it cannot be used to make a spiral.

makes it harder

It also makes it harder for her to express her feelings to him.

She is a superfan of Luke, which makes it harder for Jenny to keep his secret.

Everything is being shared on social media so it makes it harder for celebrities to live private lives.