Unstable

From BiblePortal Wikipedia

Wilson's Dictionary of Bible Types [1]

 James 1:8 (b) Many Christians are not rooted and grounded in the truth of God; therefore, they vacillate and change with the winds of doctrine, and with altered circumstances.

 2 Peter 3:16 (a) The term is used to describe those who are easily swayed by emotion, circumstances and false teachers. They do not stand their ground under pressure, or under the cunning schemes of evil men.

King James Dictionary [2]

Unsta'Ble, a.  50instabilis.

1. Not stable not fixed. 2. Not steady inconstant irresolute wavering.  James 1 .

Webster's Dictionary [3]

(a.) Not stable; not firm, fixed, or constant; subject to change or overthrow.

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