From Wiktionary, the free dictionary
loadsome (comparative more loadsome, superlative most loadsome)
- (rare) burdensome
1770, Andrew Brice, The Mobiad; Or, Battle of the Voice, page 45:
The loadsome Clog attempted Haste impedes, / And, sliding, baulks th' industrious clumsy Treads.
1988, Euromicro Symposium on Microprocessing and Microprogramming, page 513:
Simple as they may seem, the seven basic operations we just described can prove quite loadsome.