diff --git a/arch/arm/src/armv7-m/up_mpu.c b/arch/arm/src/armv7-m/up_mpu.c
index 233e621477..91113dc21b 100644
--- a/arch/arm/src/armv7-m/up_mpu.c
+++ b/arch/arm/src/armv7-m/up_mpu.c
@@ -307,7 +307,7 @@ uint32_t mpu_subregion(uintptr_t base, size_t size, uint8_t l2size)
 
   ret = mpu_subregion_ms(size + offset, l2size);
 
-  /* Then OR in the mask need to handle disabled subretinos at the beginning
+  /* Then OR in the mask need to handle disabled subregions at the beginning
    * of the region.
    */
 
diff --git a/arch/arm/src/efm32/efm32_usbhost.c b/arch/arm/src/efm32/efm32_usbhost.c
index 421472203a..bcb8557921 100644
--- a/arch/arm/src/efm32/efm32_usbhost.c
+++ b/arch/arm/src/efm32/efm32_usbhost.c
@@ -986,7 +986,7 @@ static int efm32_chan_wait(FAR struct efm32_usbhost_s *priv,
 
   flags = irqsave();
 
-  /* Loop, testing for an end of transfer conditino.  The channel 'result'
+  /* Loop, testing for an end of transfer condition.  The channel 'result'
    * was set to EBUSY and 'waiter' was set to true before the transfer; 'waiter'
    * will be set to false and 'result' will be set appropriately when the
    * tranfer is completed.
diff --git a/arch/arm/src/stm32/stm32_otgfshost.c b/arch/arm/src/stm32/stm32_otgfshost.c
index 1d700c5ad0..9cc4c5e35d 100644
--- a/arch/arm/src/stm32/stm32_otgfshost.c
+++ b/arch/arm/src/stm32/stm32_otgfshost.c
@@ -991,7 +991,7 @@ static int stm32_chan_wait(FAR struct stm32_usbhost_s *priv,
 
   flags = irqsave();
 
-  /* Loop, testing for an end of transfer conditino.  The channel 'result'
+  /* Loop, testing for an end of transfer condition.  The channel 'result'
    * was set to EBUSY and 'waiter' was set to true before the transfer; 'waiter'
    * will be set to false and 'result' will be set appropriately when the
    * tranfer is completed.
diff --git a/arch/arm/src/stm32/stm32_otghshost.c b/arch/arm/src/stm32/stm32_otghshost.c
index 97025c90fd..a50fa164fa 100644
--- a/arch/arm/src/stm32/stm32_otghshost.c
+++ b/arch/arm/src/stm32/stm32_otghshost.c
@@ -991,7 +991,7 @@ static int stm32_chan_wait(FAR struct stm32_usbhost_s *priv,
 
   flags = irqsave();
 
-  /* Loop, testing for an end of transfer conditino.  The channel 'result'
+  /* Loop, testing for an end of transfer condition.  The channel 'result'
    * was set to EBUSY and 'waiter' was set to true before the transfer; 'waiter'
    * will be set to false and 'result' will be set appropriately when the
    * tranfer is completed.