In a certain code TRADITION is written down as ARTTIDNOI. Then how VERIFY will…

This is a letter-group reversal code: the word is split into three equal-length consecutive groups of letters, each group is reversed internally (the letter order is flipped within that group), and the reversed groups are then joined in their original left-to-right order to form the code.

1. TRADITION has 9 letters, split into three equal groups of 3 letters each: TRA, DIT, ION.

2. Reverse each group internally: TRA becomes ART, DIT becomes TID, ION becomes NOI.

3. Join the reversed groups in order: ART + TID + NOI = ARTTIDNOI, which matches the given code.

4. VERIFY has 6 letters, split into three equal groups of 2 letters each: VE, RI, FY.

5. Reverse each group internally: VE becomes EV, RI becomes IR, FY becomes YF.

6. Join the reversed groups in order: EV + IR + YF = EVIRYF.

Splitting EVIRYF back into its three two-letter groups (EV, IR, YF) and reversing each group again recovers VE, RI, FY, exactly the original word VERIFY, which confirms the pattern was applied correctly in both directions.

So the code for VERIFY is EVIRYF.