a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

蛙: frog

satisfy, meet / comply with, obey / answer, respond

蛙: a frog

to change, to make different / to move or shift to a different time or place

potential of 変える (kaeru): to be changeable / passive of 変える (kaeru): to be changed

sex, gender

male and female / two natures / (chemistry) amphoteric

needed, necessary

need, necessity