• to aggravate, to encumber, to increase the weight, to make difficulties, to make heavier, to make heavy, to make more difficult, to raise difficulties, to render more difficult
• to make sg more difficult
• to make it warm for sy, to make things warm for sy
• to make it lively for sy, to make it warm for sy, to make things lively for sy, to make things warm for sy
• to make it warm for sy, to make things warm for sy