fraught
Meaning: filled with or accompanied by, often something difficult or tense
Usage: Her glances in his direction were fraught with meaning, though precisely what meaning remained unclear.
liability
Meaning: something for which one is legally responsible, usually involving a disadvantage or risk 2. a handicap, burden
Usage: Because she often lost her concentration and didn’t play defense, Marcy was a liability to the team.
bane
Meaning: a cause of harm, distress, or ruin
Usage: Advanced physics is the bane of many students’ academic lives.
onerous
Meaning: burdensome
Usage: My parents lamented that the pleasures of living in a beautiful country estate no longer outweighed the onerous mortgage payments.
encumber
Meaning: to weigh down, burden
Usage: At the airport, my friend was encumbered by her luggage, so I offered to carry two of her bags.