I'd like to briefly describe a number of large objects that are half-submerged in a swamp, and nothing quite fits so far. Just "sunken" or the like might work in a pinch, but I thought I'd ask in case someone knows a word that quickly communicates that the objects are also clearly visible above the water.
'Semisubmerged' appears to be a valid word, but not, I would say, a very elegant one.
There are words for movement half in, half out of, water - such as wallowing or floundering.
Wading can mean partially immersed, but it implies motion.
... as though they had begun wading ...