What are the meanings of rectify, unaware, tentative, alert, grievance, replica, annex, scared, rescue, taint, feeble, stringent, and fea?

1) Rectify means to correct something.
The correct option is C.
C) To correct

2) Unaware means not knowing or realizing something, which is synonymous with ignorant.
The correct option is A.
A) Ignorant

3) Tentative means not certain or fixed, provisional.
The correct option is C.
C) Provisional

4) Alert means quick to notice any unusual and potentially dangerous or difficult circumstances; vigilant. This is synonymous with observant.
The correct option is C.
C) Observant

5) A grievance is a real or imagined wrong or cause for complaint.
The correct option is B.
B) Complaint

6) A replica is an exact copy or model of something.
The correct option is A.
A) Clone

7) To annex means to add or attach.
The correct option is C.
C) Add

8) Scared means frightened or panicky.
The correct option is B.
B) Panicked

9) To rescue means to save someone or something from a dangerous or difficult situation.
The correct option is A.
A) Save

10) To taint means to contaminate or pollute something, or to stain.
The correct option is B.
B) Stain

11) The antonym of feeble (lacking physical strength, weak) is strong.
The correct option is A.
A) Strong

12) The antonym of stringent (strict, precise, and exacting) is lenient (not strict).
The correct option is B.
B) Lenient

13) The antonym of feasible (possible to do easily or conveniently) is impracticable (not able to be done).
The correct option is B.
B) Impracticable

14) The antonym of certain (known for sure; established beyond doubt) is doubtful.
The correct option is A.
A) Doubtful

15) The antonym of aware (having knowledge or perception of a situation or fact) is ignorant (lacking knowledge).
The correct option is C.
C) Ignorant