diff --git a/man7/mount_namespaces.7 b/man7/mount_namespaces.7
index 86c585ec8..1f9888a07 100644
--- a/man7/mount_namespaces.7
+++ b/man7/mount_namespaces.7
@@ -1130,7 +1130,7 @@ which is the error that the kernel returns to indicate that
 the mount is locked.
 .IP *
 Following on from the previous point,
-note that it is possible to unmount an entire tree of mounts that
+note that it is possible to unmount an entire subtree of mounts that
 propagated as a unit into a less privileged mount namespace,
 as illustrated in the following example.
 .IP
@@ -1207,7 +1207,7 @@ ns3# \fBgrep /mnt /proc/self/mountinfo | sed \(aqs/ \- .*//\(aq\fP
 .IP
 Because the propagation type of the parent mount,
 .IR /mnt ,
-was shared, the recursive bind mount propagated a small tree of
+was shared, the recursive bind mount propagated a small subtree of
 mounts under the slave mount
 .I /mnt
 into "ns2",
@@ -1227,7 +1227,7 @@ ns2# \fBgrep /mnt /proc/self/mountinfo | sed \(aqs/ \- .*//\(aq\fP
 While it is not possible to unmount a part of the propagated subtree
 .RI ( /mnt/ppp/y )
 in "ns2",
-it is possible to unmount the entire tree,
+it is possible to unmount the entire subtree,
 as shown by the following commands:
 .IP
 .in +4n