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Webster 1913 Edition

Adj.

Fitted to gall or chafe; vexing; harassing; irritating.

–

Gall′ing-ly

adv.

ppr.

[See Gall, the verb.]

Fretting the skin; excoriating.

Adapted to fret or chagrin; vexing.

galling ‎(comparative more galling, superlative most galling)

vexing, humiliating
- 2014, Daniel Taylor, "World Cup 2014: Uruguay sink England as Suárez makes his mark," guardian.co.uk, 20 June:
  Uruguay were quick to the ball, strong in the tackle and seemed intent on showing they were a better team than had been apparent in their defeat to Costa Rica. Yet the most galling part for England is that they helped them on their way.

vexing

galling