(man-)kind, nature(-al)

“Natural” From Concise Bible Dictionary:

That which is according to nature.
1. γένεσις, “origin, birth.” Man beholds his natural face in a glass (James 1:23).
2. κατὰφύσιν, “according to nature.” The Israelites are called the natural branches of the olive tree which God planted on earth (Rom. 11:21,24). φυσικός, “that which belongs to nature” (Rom. 1:26-27; 2 Peter 2:12; Jude 10).
3. φυχικός, from “life, soul.” “The natural man [that is, a man characterized by the natural life of the soul, without the teaching and power of the Holy Spirit] receiveth not the things of the Spirit of God” (1 Cor. 2:14). The body of the Christian is sown “a natural body” (having had natural life through the living soul); it will be raised “a spiritual body” (1 Cor. 15:44-46).

“Nature” From Concise Bible Dictionary:

The inherent qualities of a being manifested in the various characteristics which mark and display its existence: the aggregate of such qualities is what is termed its nature, and one class or order of being is thus distinguished from another. Men by nature are the children of wrath (Eph. 2:3); whereas the Christian becomes morally partaker of the divine nature (2 Peter 1:4); of which love is the characteristic: he is made partaker of God’s holiness (Heb. 12:10). The work of God in the Christian which forms his nature thus finds its expression in him. The Creator can design and predicate the nature of a being before that being has an actual existence in fact; but we, as creatures, can discern the nature only from the existent being, and cannot therefore rightly speak of the nature save as characteristic of the being.
Nature is also a term descriptive of the vast system of created things around us, to each part of which the Creator has given not only its existence, but its use, its order, its increase, its decay—often called the “laws of nature”—the laws which govern each and which constitute its propriety. Thus nature teaches that a man should not have long hair (1 Cor. 11:14); and a multitude of other things that are of God’s order in creation.

Strong’s Dictionary of Greek Words:

Greek:
φύσις
Transliteration:
phusis
Phonic:
foo’-sis
Meaning:
from 5453; growth (by germination or expansion), i.e. (by implication) natural production (lineal descent); by extension, a genus or sort; figuratively, native disposition, constitution or usage
KJV Usage:
(man-)kind, nature(-al)