From bf7e31f9eaab32745f6b5edb900b90963e1de184 Mon Sep 17 00:00:00 2001
From: Holly Freeman <hfreeman0236501@gmail.com>
Date: Tue, 17 Mar 2026 14:57:19 -0400
Subject: [PATCH 1/2] issue 1674 irregular plurals added

---
 src/Humanizer/Inflections/Vocabularies.cs | 14 +++++++++++++-
 tests/Humanizer.Tests/InflectorTests.cs   |  7 +++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/Humanizer/Inflections/Vocabularies.cs b/src/Humanizer/Inflections/Vocabularies.cs
index 5b31baa0a..6eac2b950 100644
--- a/src/Humanizer/Inflections/Vocabularies.cs
+++ b/src/Humanizer/Inflections/Vocabularies.cs
@@ -43,7 +43,7 @@ static Vocabulary BuildDefault()
         _default.AddSingular("(n)ews$", "$1ews");
         _default.AddSingular("([dti])a$", "$1um");
         _default.AddSingular("(analy|ba|diagno|parenthe|progno|synop|the|ellip|empha|neuro|oa|paraly)ses$", "$1sis");
-        _default.AddSingular("([^f])ves$", "$1fe");
+        _default.AddSingular("(kni|wi|li)ves$", "$1fe");
         _default.AddSingular("(hive)s$", "$1");
         _default.AddSingular("(tive)s$", "$1");
         _default.AddSingular("([lr]|hoo|lea|loa|thie)ves$", "$1f");
@@ -94,6 +94,18 @@ static Vocabulary BuildDefault()
         _default.AddIrregular("clove", "cloves");
         _default.AddIrregular("valve", "valves");
         _default.AddIrregular("explosive", "explosives");
+        _default.AddIrregular("safe", "saves", matchEnding: false);
+        _default.AddIrregular("curve", "curves");
+        _default.AddIrregular("carve", "carves");
+        _default.AddIrregular("starve", "starves");
+        _default.AddIrregular("serve", "serves");
+        _default.AddIrregular("swerve", "swerves");
+        _default.AddIrregular("revolve", "revolves");
+        _default.AddIrregular("involve", "involves");
+        _default.AddIrregular("evolve", "evolves");
+        _default.AddIrregular("dissolve", "dissolves");
+        _default.AddIrregular("resolve", "resolves");
+        _default.AddIrregular("absolve", "absolves");
 
         _default.AddUncountable("staff");
         _default.AddUncountable("training");
diff --git a/tests/Humanizer.Tests/InflectorTests.cs b/tests/Humanizer.Tests/InflectorTests.cs
index 10cd54062..610334e61 100644
--- a/tests/Humanizer.Tests/InflectorTests.cs
+++ b/tests/Humanizer.Tests/InflectorTests.cs
@@ -404,6 +404,13 @@ public IEnumerator<object[]> GetEnumerator()
 
         //Issue #1042
         yield return ["database", "databases"];
+
+        //Issue #1674
+        yield return ["arrive", "arrives"];
+        yield return ["drive", "drives"];
+        yield return ["curve", "curves"];
+        yield return ["behave", "behaves"];
+
     }
 
     IEnumerator IEnumerable.GetEnumerator() =>

From 5ed7f5c7f48ad3b61eb4958297d18c0e2898da60 Mon Sep 17 00:00:00 2001
From: Holly Freeman <hfreeman0236501@gmail.com>
Date: Tue, 17 Mar 2026 15:36:32 -0400
Subject: [PATCH 2/2] fixed a potential bug

---
 src/Humanizer/Inflections/Vocabularies.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Humanizer/Inflections/Vocabularies.cs b/src/Humanizer/Inflections/Vocabularies.cs
index 6eac2b950..163205064 100644
--- a/src/Humanizer/Inflections/Vocabularies.cs
+++ b/src/Humanizer/Inflections/Vocabularies.cs
@@ -94,7 +94,7 @@ static Vocabulary BuildDefault()
         _default.AddIrregular("clove", "cloves");
         _default.AddIrregular("valve", "valves");
         _default.AddIrregular("explosive", "explosives");
-        _default.AddIrregular("safe", "saves", matchEnding: false);
+        _default.AddIrregular("safe", "saves");
         _default.AddIrregular("curve", "curves");
         _default.AddIrregular("carve", "carves");
         _default.AddIrregular("starve", "starves");