Certain gismu have, over time, become treated like "prefixes" and "suffixes"; they are used for many lujvo, and they make them in a highly predictable manner.
For example: {zabna binxo -> zanbi'o "to (improve/change in a favorable manner)"} is treated as {zabna fa lo nu X1 binxo X2 X3 [X4 ...]}
While {binxo gasnu -> bixygau "to (change something else / cause something else to change)"} is treated as {X1 gasnu lo nu X2 binxo X3 X4 [X5 ...]}
Unfortunately this causes clashes when two "promiscuous" gismu meet! What exactly would {zangau} mean?
It could mean {zabna fa lo nu X1 gasnu X2} (roughly "does good deeds / does favors"), or it could mean {X1 gasnu lo nu X2 zabna X3 X4} (possibly "to bless")!