dawdler, lag, lagger

Lagger: Someone who takes more time tan necessary; A dawdler

Synonyms crawler, dallier, dawdler, dragger, laggard, lagger, lingerer, loiterer, plodder, snail, straggler

Many reasons. Darwin was meticulous in gather more and more evidence in support of the theory and was a bit of a dawdler. Also he was well aware of the social upheaval the theory would cause, especially from the very religious. Finally he knew that he chanced hurting his wife who was a devout Christian.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern --WDL--. That is, seven letter words with 3rd letter W and 4th letter D and 5th letter L. In alphabetical order, they are:

dawdled

dawdler

dawdles