Which of the meanings of いい加減 apply in these cases?


I recently came across the word いい加{か}減{げん} for the first time. Here's the
definition I found:

> **いい加{か}減{げん}:**  
>
>
> 1. 無{む}責{せき}任{にん}で、当{あ}てにならない様{よう}子{す}。  
>  `例` 仕{し}事{ごと}の後{あと}始{し}末{まつ}がいい加{か}減{げん}で困{こま}る。  
>  2. ほどよい様{よう}子{す}。  
>  `例` お湯{ゆ}の温{おん}度{ど}がちょうどいい加{か}減{げん}になった。  
>  3. かなり。大{だい}分{ぶ}。  
>  `例` いい加{か}減{げん}疲{つか}れた。

I.e.: 1. irresponsible, unreliable; 2. moderate; 3. quite, rather,
considerably.

My problem is that I have a hard time fitting any of these definitions in the
contexts where I first ran into いい加減.

One of these contexts was in one of the definitions of yet _another_ word:

> **大{たい}抵{てい}:**  
>  ...  
>  3. ほどほどにする様{よう}子{す}。いい加{か}減{げん}。  
>  `例` わがままも **たいてい** にしなさい。  
>  ...

If たいてい is another word for いい加減, then what could the example sentence above
possibly mean? Since "ほどほどにする様子" appears alongside いい加減 in this definition, it
would seem to me that the definition of いい加減 that applies here is the second
one above (i.e. "moderate"), but then the last example sentence above would
translate to "Be moderately selfish." Is this right? Somehow, it does not
strike me as the typical example sentence in a dictionary. (If I attempt
fitting any of the other two definitions of いい加減 into this example sentence,
the results are even worse.)

Finally, here is another context in which I ran into いい加減. Yes, it's yet one
more definition.

> **適{てき}当{とう}:**  
>  ...  
>  3. いい加{か}減{げん}な様{よう}子{す}。  
>  `例` **適当** なことを言う。

Again, I am left to figure out which of the definitions of いい加減 is intended
here. Now, one other definition of 適当 is something like "appropriate,
suitable, fitting," and it would be surprising that the same word could also
mean "irresponsible, unreliable." This argues against the first definition of
いい加減. On the other hand, I can't figure out a way to make the third definition
of いい加減 fit into the last example sentence above. Therefore, by a process of
elimination, I conclude that this sentence must mean something like "to say
something moderate."

* * *

To sum up, how would one translate the following sentences:

  1. わがままもたいていにしなさい。
  2. 適当なことを言う。

...and how do these translations fit with the definitions of たいてい, 適当, and
いい加減 given above?




Short answer is, 大抵#3 = いい加減#2 and 適当#3 = いい加減#1.

As asked in [this question](https://japanese.stackexchange.com/q/66021/45489),
いい加減#1 and #2 are kind of opposite.

Roughly, the literal meaning of いい加減 is 'good degree' and if it is positively
understood as 'within limits', then it means #2 _moderate, to an appropriate
degree_. It can be understood negatively as not going as far as one can or
stop randomly or halfway, resulting in #1 _irresponsible, unreliable_.

適当 has the same ambiguity. Literally it means _to the point_ and _appropriate_
as such, but again it can mean stopping halfway and _unreliable_.

Now for the sentences,

  1. わがままもたいていにしなさい。

Here 大抵 means いい加減#2. Here も works as limiting the context, so _Be moderate in
being selfish_ or _don't be too selfish_.

  2. 適当なことを言う。

It is 'unreliable' sense of 適当 and いい加減(#1), so 'to say random things'.




Short answer is, 大抵#3 = いい加減#2 and 適当#3 = いい加減#1.

As asked in [this question](https://japanese.stackexchange.com/q/66021/45489),
いい加減#1 and #2 are kind of opposite.

Roughly, the literal meaning of いい加減 is 'good degree' and if it is positively
understood as 'within limits', then it means #2 _moderate, to an appropriate
degree_. It can be understood negatively as not going as far as one can or
stop randomly or halfway, resulting in #1 _irresponsible, unreliable_.

適当 has the same ambiguity. Literally it means _to the point_ and _appropriate_
as such, but again it can mean stopping halfway and _unreliable_.

Now for the sentences,

  1. わがままもたいていにしなさい。

Here 大抵 means いい加減#2. Here も works as limiting the context, so _Be moderate in
being selfish_ or _don't be too selfish_.

  2. 適当なことを言う。

It is 'unreliable' sense of 適当 and いい加減(#1), so 'to say random things'.

