無

lawlessness

to think hard about (something that one doesn't know much of); to rack one's brain

lacking talent; lacking accomplishments

Sutra of Immeasurable Life

nonexistence or existence; absence or presence

Biology

asexual reproduction; monogony; agamogenesis

unsalted butter

secret ballot

without a vote

illiteracy

irreligion; unbelief; atheism; atheist

ne'er-do-well; waster; idler; good-for-nothing

scraping together (a sum of money); raising (a sum of money) by straining one's credit

open city declaration

Philosophy

immediacy

Medicine

obstetric analgesia during labor and delivery (e.g. epidural); painless childbirth

amorphous; shapeless

being available for free (broadcast) online

radio equipment; facility that can transmit radio waves (as defined in Japan's radio law)

smokeless (gun)powder

anonymous person; a nobody

Colloquial

very small breasts

indefinite postponement; putting on hold

Mathematics

infinitesimal