diff --git a/lib/elixir/lib/calendar/naive_datetime.ex b/lib/elixir/lib/calendar/naive_datetime.ex
index 386a65f320..01dab36811 100644
--- a/lib/elixir/lib/calendar/naive_datetime.ex
+++ b/lib/elixir/lib/calendar/naive_datetime.ex
@@ -754,7 +754,7 @@ defmodule NaiveDateTime do
   @doc """
   Converts the given naive datetime to a string according to its calendar.
 
-  For redability, this function follows the RFC3339 suggestion of removing
+  For readability, this function follows the RFC3339 suggestion of removing
   the "T" separator between the date and time components.
 
   ### Examples
diff --git a/lib/elixir/lib/module/types/helpers.ex b/lib/elixir/lib/module/types/helpers.ex
index 77d0270c91..7ae354bef5 100644
--- a/lib/elixir/lib/module/types/helpers.ex
+++ b/lib/elixir/lib/module/types/helpers.ex
@@ -239,7 +239,7 @@ defmodule Module.Types.Helpers do
   Converts the given expression to a string,
   translating inlined Erlang calls back to Elixir.
 
-  We also undo some macro expresions done by the Kernel module.
+  We also undo some macro expressions done by the Kernel module.
   """
   def expr_to_string(expr) do
     expr
diff --git a/lib/elixir/src/elixir_json.erl b/lib/elixir/src/elixir_json.erl
index f2a443c2fc..6413fb1e8d 100644
--- a/lib/elixir/src/elixir_json.erl
+++ b/lib/elixir/src/elixir_json.erl
@@ -716,7 +716,7 @@ value(<<$[, Rest/bits>>, Original, Skip, Acc, Stack, Decode) ->
 value(<<${, Rest/bits>>, Original, Skip, Acc, Stack, Decode) ->
     object_start(Rest, Original, Skip, Acc, Stack, Decode, 1);
 value(<<Byte, _/bits>>, Original, Skip, _Acc, _Stack, _Decode) when ?is_ascii_plain(Byte) ->
-    %% this clause is effecively the same as the last one, but necessary to
+    %% this clause is effectively the same as the last one, but necessary to
     %% force compiler to emit a jump table dispatch, rather than binary search
     invalid_byte(Original, Skip);
 value(_, Original, Skip, Acc, Stack, Decode) ->