diff --git a/call_test.go b/call_test.go
index 0a224f06..7e7f743b 100644
--- a/call_test.go
+++ b/call_test.go
@@ -122,7 +122,7 @@ func newTestServer() *server {
 	return &server{startedErr: make(chan error, 1)}
 }
 
-// start starts server. Other goroutines should block on s.startedErr for futher operations.
+// start starts server. Other goroutines should block on s.startedErr for further operations.
 func (s *server) start(t *testing.T, port int, maxStreams uint32) {
 	var err error
 	if port == 0 {
diff --git a/clientconn.go b/clientconn.go
index 15d7af6c..e2264236 100644
--- a/clientconn.go
+++ b/clientconn.go
@@ -52,10 +52,10 @@ var (
 	// ErrUnspecTarget indicates that the target address is unspecified.
 	ErrUnspecTarget = errors.New("grpc: target is unspecified")
 	// ErrNoTransportSecurity indicates that there is no transport security
-	// being set for ClientConn. Users should either set one or explicityly
+	// being set for ClientConn. Users should either set one or explicitly
 	// call WithInsecure DialOption to disable security.
 	ErrNoTransportSecurity = errors.New("grpc: no transport security set (use grpc.WithInsecure() explicitly or set credentials)")
-	// ErrCredentialsMisuse indicates that users want to transmit security infomation
+	// ErrCredentialsMisuse indicates that users want to transmit security information
 	// (e.g., oauth2 token) which requires secure connection on an insecure
 	// connection.
 	ErrCredentialsMisuse = errors.New("grpc: the credentials require transport level security (use grpc.WithTransportAuthenticator() to set)")
diff --git a/test/end2end_test.go b/test/end2end_test.go
index 86c921fc..8b64234b 100644
--- a/test/end2end_test.go
+++ b/test/end2end_test.go
@@ -333,7 +333,7 @@ func TestReconnectTimeout(t *testing.T) {
 			return
 		}
 	}()
-	// Block untill reconnect times out.
+	// Block until reconnect times out.
 	<-waitC
 	if err := conn.Close(); err != grpc.ErrClientConnClosing {
 		t.Fatalf("%v.Close() = %v, want %v", conn, err, grpc.ErrClientConnClosing)
diff --git a/transport/handler_server.go b/transport/handler_server.go
index 63ba0537..d7e18a0b 100644
--- a/transport/handler_server.go
+++ b/transport/handler_server.go
@@ -118,7 +118,7 @@ func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTr
 
 // serverHandlerTransport is an implementation of ServerTransport
 // which replies to exactly one gRPC request (exactly one HTTP request),
-// using the net/http.Handler interface. This http.Handler is guranteed
+// using the net/http.Handler interface. This http.Handler is guaranteed
 // at this point to be speaking over HTTP/2, so it's able to speak valid
 // gRPC.
 type serverHandlerTransport struct {
diff --git a/transport/transport_test.go b/transport/transport_test.go
index b8655c02..a05b3ac8 100644
--- a/transport/transport_test.go
+++ b/transport/transport_test.go
@@ -134,7 +134,7 @@ func (h *testStreamHandler) handleStreamMalformedStatus(t *testing.T, s *Stream)
 	h.t.WriteStatus(s, codes.Internal, "\n")
 }
 
-// start starts server. Other goroutines should block on s.readyChan for futher operations.
+// start starts server. Other goroutines should block on s.readyChan for further operations.
 func (s *server) start(t *testing.T, port int, maxStreams uint32, ht hType) {
 	var err error
 	if port == 0 {