barely
He barely passed the exam.
かろうじて
hardly
I can hardly hear you over the noise.
ほとんど〜ない
exclusively
The conference is exclusively for researchers.
もっぱら
merely
It was merely a suggestion not an order.
単に
reluctantly
She reluctantly agreed to the plan.
しぶしぶ
restrictively
Entry is restrictively limited to VIP members.
制限して
solely
The task was solely his responsibility.
単独で
insufficiently
The funds were insufficiently allocated.
不十分に
inadequately
The project was inadequately planned.
不適切に
scarcely
There was scarcely enough time to finish.
ほとんど〜ない