Long words game

[Ivokyuftaf6666]

Computer.

I, N, S.

[L8V4G]

Sincerity.

E, T, P

[Ivokyuftaf6666]

Telepathy!

I, N, F

[L8V4G]

Infrastructure.

T, N, A

[Ivokyuftaf6666]

Talented.

S, Y, M.

[L8V4G]

Symmetry.

E, A, I

[Ivokyuftaf6666]

Elation.
Appreciation.
Admirable!

O, U, Y.

[L8V4G]

Undoubtedly.

(Ivokyuftaf6666 is undoubtedly awesome!)

E, I, G

[Ivokyuftaf6666]

Delightfully.

Thank you. L8V4G is delightfully positive.

F, H, I.

[L8V4G]

Fifteenth.

S, I, E

[Ivokyuftaf6666]

Sixteenth!

N, V, I.

[L8V4G]

Introvert.

T, P, N

[Ivokyuftaf6666]

Pleasantly.
Impenetrability.

(You had an option to write seventeenth and to continue the chain of ordinal numbers.)

L, A, O.

[L8V4G]

Optimistically.

...
(You had an option to write seventeenth and to continue the chain of ordinal numbers.)
...

(^Friend I do not know how to in the fashion of the letters you gave of N, V, I. You are a lovable friend that I enjoy playing forum games with very much.)

[Ivokyuftaf6666]

Thank you very much, my amazing best friend. I am very grateful to you for being a true friend to me.
If the word is at least ten letters long, then it will fit the rules of this game even if it has only a couple of the letters given.

P, K, T.

[L8V4G]

Tropicalness.

Thank you very much, my amazing best friend. I am very grateful to you for being a true friend to me.
If the word is at least ten letters long, then it will fit the rules of this game even if it has only a couple of the letters given.

P, K, T.

^Thank you for the compliment. Friend, thank you for reminding me of the 10 letter rule, I know understand! Thank you for continuing this game as I forgot to post three new letters. Sorry. You are a wonderful friend that I respect very much!

A, W, S

[Ivokyuftaf6666]

Awesomeness.
(A virtue of yours. Also, thank you for the positive comment.)

T, H, Y.

[L8V4G]

Thoroughness.

(^Thank you.)

E, S, A

[Ivokyuftaf6666]

Satisfied.

S, I, G.

[L8V4G]

Generosity.

C, F, L