The result leaves the Baggies seven points adrift at the foot of the table, and their head coach has put the latest reverse down to a lack of confidence.
"I was disappointed with the performance. We worked hard this week and looked good going into the game but it wasn't reflected in the game," BBC Sport quotes Pardew as saying.
"Huddersfield knock you out of any rhythm with the way they play and it was a bitty game. We didn't really have any passages of play. It was a messy game, which they are good at. They get into your face and with the confidence we have maybe it affected us a bit.
"We have two or three flair players missing but we should have had enough to beat Huddersfield really."