TRAIST, vb. to trust.  Bruce, I, 125; XVII, 273; Rolland, I, 27.
    Trast, adj. secure, traist, sb. confidence.  Lindsay,
    229, 195. Traisting, sb. confidence, reliance, L.L., 25. 
    Cp.  O.N. troeysta, adj. traustr, and Eng. trust, M.E.
    trusten.  I do not at present understand the relation between
    the forms in e, and these in u and ou.

TRIG, adj. trim, neat, handsome.  M.W., 159, 26.  O.N. tryggr,
    true, trusty, unconcerned, trygging, security, O. Dan.
    trygd, trugd, confidence (Schlyter), Norse trygg,
    secure, unconcerned, confident, tryggja, to consider secure,
    tryggja sek, feel secure, Dan. tryg, fearless, confident. 
    Cp.  Cu. trig, tight, well-fitted, “trig as an apple.”  The
    M.E. trig means faithful, see B-S.  Ramsay, II, 526, uses the
    adv. trigly in the sense of “proudly.”

TWIST, sb. twig, branch.  Bruce, VII, 188; Montg., C. and S.,
    Irving, 468.  O.N. kvistr, a twig, O. Dan., quist, Norse,
    Dan. kvist, Sw. quist, id.  For the change of kv (kw)
    to tw cp.  Norse, Dan. kviddre, Sw. quittra, Du.
    kwittern with Eng. twitter, and kj to tj in W.Norse. 
    A regular change.

TYNE, vb. lose, impair, destroy.  C.S., 3; Wyntoun, IX, 21, 14;
    R.R. 779.  O.N. tyna, to lose, destroy, Norse tyna, to
    lose, sometimes impair, Sw. dial. tyna, to destroy.

TYNSELL, TYNSALE, sb. loss.  Bruce, V, 450, XIX, 449; R.R., 505.  In
    Wyntoun, IX, 3, 25, it means “delay, loss of time,” frequently
    means “loss of life, slaughter.”  M.E. tinsel, loss, ruin,
    probably a Sco. formation from tyne, to lose, similarly in
    Norse tynsell, loss (not frequent), from tyna.

TYNSALE, vb. to lose, suffer loss.  Bruce, XIX, 693.  See the sb.

TYTT, adj. firm, tight.  Wallace, VII, 21, 2.  O.N. þittr, tight,
    close, Norse, tett or titt, Dan. taet, Sw. taet, close
    together, tight, Eng. dial. theet.  The long vowel in theet
    is unusual.

UG, vb. to dislike, abhor.  Winyet, II, 31, 32; Scott, 71, 119. 
    O.N. ugga, abhor, Norse ugga, see B-S.

UGSUM, adj. fearful.  Sat.  P., 3, 135.  See ug. Ougsum, Howlate,
    I, 8, means “ugly.”

UNDERLIE, adj. wonderful.  Gau, 29, 24.  Dan. underlig, Norse,
    underleg, O.N. underlegr, wonderful, shows Scand. loss of
    w before u.  The O.E. word is wundorlic, cp.  Scand.
    ulf, Eng. wolf.  The word is Dan. in Gau.