Xjyuk

Ram married his daughter is ambiguous because:

Marry means marry somebody to become a spouse.

The second meaning is perform the marriage ritual as a priest.

So, if Ram is a priest he can marry his daughter.

I don't think native speakers ever say that but nonnative speakers sometimes say it in the sense of I got my daughter married.

Suppose native speakers hear that sentence, how would they understand it?

Your sentence is no different from any other verb with multiple meanings. For example:

• 
  Ram played with his daughter could mean that they played backgammon together, played football together, or played instruments together


• 
  Ram ran with his daughter could mean they went for a jog together, or they were running an election campaign together


• 
  Ram spoke with his daughter could mean they had a conversation, or mean they were co-presenters at a conference


• 
  Ram banked with his daughter could mean they had a joint checking account, or were together in the cockpit of a turning airplane


• 
  Ram drove with his daughter could mean his daughter was riding in his car, or that they were both on horse bringing cattle back to their ranch

Your question is: How do native speakers interpret such ambiguous sentences? The same ways a non-native speaker would:

• 
  By context. Rarely are such sentences used in isolation; they are usually part of a longer conversation or found in a longer paragraph. Quite often, surrounding context will make it clear which meaning is intended. If I say, "Ram spoke with his daughter, and afterwards they got a standing ovation," it becomes very unlikely that I'm talking about a private chit-chat at a small café.


• 
  By setting. Cars are ubiquitous in today's society; cattle drives not so much. Although "Ram drove with his daughter" could mean they were on two horses, chances are they were in an automobile.


• 
  By asking for clarification. Let's say I ask a friend of mine, "What's new?" and he answers, "Ram married his daughter." If I knew Ram was a priest, I might ask, "Did he officiate the ceremony?" On the other hand, if the conversation begins with, "I wonder if anyone in the priesthood has ever performed a wedding ceremony for one of their children," then the response, "Ram married his daughter," takes on an entirely different meaning.


• 
  By giggling. Sometimes potential ambiguity leads to humorous results. Some blog posts list hilarious newspaper headlines, like 4-H Girls Win Prizes for Fat Calves and Drunk Gets Nine Months in Violin Case. (In that latter case, it's pretty obvious that case refers to a court case, not an instrument case, but we can all still laugh at the ambiguity and the funny imagery it conjures.)

Incidentally, the phenomenon you inquire about is called polysemy, and you can read all about it in Wikipedia. The humorist Groucho Marx employed polysemes brilliantly, with gems like:

• Time flies like an arrow; fruit flies like a banana.


• One morning I shot an elephant in my pajamas. How he got into my pajamas, I'll never know.


• I've had a perfectly wonderful evening. But this wasn't it.

Yes, technically it is ambiguous, but in reality not so much - a native speaker would always extend/qualify the statement, along the lines of "Ram married his daughter to 'someone' ", or possibly "Ram married his daughter off" precisely because it is such an obvious and known ambiguity.